I have often heard this question asked as though history must contain one hidden explanation: Why were Jews persecuted again and again in Europe?

The question sounds simple. The answer is not.

Jews lived under Roman rulers, medieval Christian kings, absolutist monarchs and modern nation-states. The societies around them changed. So did the accusations. A religious minority condemned for rejecting Christianity could later be attacked as an economic rival. By the nineteenth century, political movements increasingly portrayed Jews as outsiders within the nation. Racial theorists then made an even more dangerous claim: Jewishness was supposedly biological and therefore could never be escaped through conversion or assimilation.

The remarkable feature of European antisemitism was not that one accusation survived unchanged for two thousand years. It was its ability to change. Old prejudices found new languages.

The Christian Roots of European Anti-Judaism

Any serious account has to begin with religion.

Christianity emerged from Judaism, and Jesus and his earliest followers were themselves Jewish. As Christianity developed into a separate religion, however, Christian-Jewish relations became increasingly hostile.

For centuries, Christian teaching often portrayed Jews as people who had rejected Christ. The false accusation of collective Jewish responsibility for the death of Jesus became particularly destructive.

The United States Holocaust Memorial Museum explains how Christian teachings contributed to anti-Jewish prejudice in Europe. Religious ideas did not automatically produce violence everywhere, but they supplied a vocabulary through which Jews could be portrayed as spiritually dangerous outsiders.

Medieval Europe was not a modern secular political order. Religion shaped law and political legitimacy. It also helped define community membership.

Jews therefore occupied an unusual position. Rulers might protect a Jewish community because it performed useful commercial or administrative functions. The same community could remain socially separate and legally vulnerable.

Protection was not equality.

When Myth Became a Weapon

Once a minority has been marked as fundamentally different, extraordinary accusations become easier to believe.

One of the most notorious was the blood libel, the false claim that Jews murdered Christian children and used their blood for religious rituals.

The Holocaust Encyclopedia traces a major medieval European example to Norwich in 1144. Similar accusations later appeared elsewhere.

The claim was incompatible with Jewish religious law, which prohibits consuming blood. That did not prevent the story from spreading.

Another accusation appeared during the Black Death. As plague devastated Europe in the fourteenth century, Jews were accused in some places of poisoning wells and causing the disease. Communities already living at society’s margins became convenient targets when frightened populations searched for a human explanation for catastrophe.

A crisis occurs. Its causes are difficult to understand. People want an identifiable culprit. A minority already surrounded by suspicion becomes easier to blame than an invisible pathogen or a complicated economic system.

The Economic Question Needs More Care

Popular explanations of antisemitism often jump quickly from religion to moneylending. There is some historical basis for the connection, but the simplified version creates another distortion.

In parts of medieval and early-modern Europe, authorities restricted Jewish land ownership and excluded Jews from guilds or particular occupations. Christian restrictions on lending at interest also affected the structure of credit markets. Under these conditions, some Jews became active in lending, commerce and financial intermediation.

But Jews were never simply a continent-wide caste of moneylenders. Jewish economic life varied by place and period. Jews worked as merchants and craftsmen. Some were physicians. Many were poor.

What mattered politically was visibility. A debtor may know the person collecting his debt. He rarely sees the political system that created the credit market.

Rulers sometimes benefited from Jewish financial activity while leaving Jewish communities exposed to resentment. A monarch could protect Jewish lenders when their services were useful and later confiscate assets or expel the community when political circumstances changed.

England expelled its Jews in 1290. France carried out repeated expulsions, including one in 1394. Spain ordered Jews to convert or leave in 1492.

Economic interests could play a role in such decisions. So could religious pressure and royal politics. Local conflicts mattered as well. There was no single European formula.

Expulsion Revealed a Deeper Problem

The recurring expulsions reveal something more important than any theory about Jewish occupations: Jews often lacked secure political power.

A minority can appear economically visible while remaining politically vulnerable. Those conditions are not contradictory.

A ruler may borrow from a minority community, tax it heavily and protect it for years. None of that guarantees equal citizenship. If the ruler changes policy, protection can disappear.

Medieval Jewish communities repeatedly lived inside this contradiction. Their presence could be useful to rulers while their security remained conditional.

That distinction matters because historical discussions sometimes reverse the relationship between wealth and power. A prosperous merchant may possess money without controlling the institutions that decide whether he may remain in the country.

Property is not sovereignty.

Emancipation Changed the Question

Europe changed dramatically after the Enlightenment and the political revolutions that followed.

During the nineteenth century, restrictions on Jews were gradually removed in many European countries. Jews increasingly entered universities and professions. They participated in national political life and became citizens rather than members of a permanently separate legal community.

One might expect prejudice to have disappeared as legal exclusion weakened. It did not. Instead, antisemitism adapted.

The Holocaust Encyclopedia’s history of nationalism and antisemitism describes the changing environment. Emancipation gave Jews greater opportunities to participate in European society, while rapid economic and political change helped create new resentments about that participation.

The old accusation had been that Jews refused to become Christian. The newer accusation increasingly became that Jews could never truly become German, French, Austrian or Russian.

The target moved. Assimilation could not solve a prejudice whose conditions kept changing.

Religion Gave Way to Race

Late nineteenth-century Europe added another ingredient: racial pseudoscience.

Thinkers attempted to divide humanity into supposedly biological races with inherited characteristics. Antisemites incorporated older religious and economic stereotypes into this new racial language.

The shift had terrible consequences. Under traditional religious hostility, conversion theoretically offered a Jew a route into Christian society, even though converts could still face suspicion. Racial antisemitism closed that door.

If Jewishness was supposedly inherited through blood, baptism changed nothing.

The USHMM’s account of racial antisemitism explains how racial theorists presented Jews not simply as followers of an unwanted religion but as an allegedly permanent biological group.

There was no scientific basis for this theory. Its political usefulness was another matter.

A racial enemy cannot debate his way into acceptance. He cannot change religion and escape. He cannot prove loyalty through military service or cultural assimilation. His existence becomes the accusation.

Conspiracy Theory Supplied the Missing Explanation

Modern society created enormous systems that ordinary people could not easily see or understand. Industrial capitalism transformed economies. Financial markets crossed borders. Newspapers created mass political audiences, while revolutionary movements challenged established governments.

Conspiracy theories offered a seductive explanation. Someone must secretly be controlling everything.

Jews were accused of controlling finance. Strangely, antisemites could simultaneously blame Jews for revolutionary socialism. The contradiction did not destroy the conspiracy theory because conspiracy theories do not require internal consistency. They require an enemy.

Nothing illustrates this better than The Protocols of the Elders of Zion.

First published in the Russian Empire in the early twentieth century, the document purported to reveal a secret Jewish plan for world domination. It was a fabrication.

Investigators repeatedly exposed it as fraudulent. The Holocaust Encyclopedia describes it as one of the most widespread antisemitic publications of modern times.

Yet exposure did not kill the story. Evidence can disprove a document. It does not necessarily destroy the political need that made people want to believe it.

The Nazis Did Not Invent Antisemitism

When Adolf Hitler and the Nazi movement entered German politics, they inherited centuries of European anti-Jewish imagery. They radicalised it.

Nazism combined older stereotypes with racial ideology and an extreme vision of national struggle. Jews were portrayed not merely as unwanted neighbours but as an existential racial enemy.

Once the Nazis took power in 1933, prejudice acquired the machinery of a modern state. Propaganda reinforced exclusion. Laws stripped Jews of rights. The Nuremberg Laws of 1935 defined Jewish identity through ancestry and deprived German Jews of citizenship rights.

Persecution then escalated into systematic mass murder during the Second World War.

Nazi Germany, assisted by its allies and collaborators, murdered approximately six million European Jews in the Holocaust. The United States Holocaust Memorial Museum estimates that this represented roughly two-thirds of Europe’s prewar Jewish population.

The Holocaust therefore cannot be explained simply as a medieval hatred continuing unchanged into the twentieth century. Modern bureaucracy mattered. Racial ideology mattered too. War created conditions for radicalisation on a continental scale.

But the Nazis did not have to invent the image of the Jew as an alien threat. Europe had been constructing versions of that image for centuries.

Why Did the Accusations Contradict Each Other?

This may be the most revealing part of the history.

Jews were attacked for remaining separate. Then Jews who assimilated were accused of secretly infiltrating society.

They were portrayed as capitalists exploiting workers. They were also portrayed as communists trying to destroy capitalism.

They were accused of being rootless internationalists while simultaneously being accused of excessive loyalty to their own communities.

The contradictions tell us something. Antisemitism was not a rational response to a consistent set of Jewish behaviours. The stereotype changed according to the political need of the society producing it.

The Jew could be made to represent whatever frightened people at a particular moment. That adaptability helped the prejudice survive.

The More Useful Historical Question

I began with the familiar question: Why were Jews persecuted in Europe?

After looking at the history, I think a more revealing question emerges: How did European institutions repeatedly make a small minority available for blame?

Religion created boundaries between believer and outsider. Laws sometimes converted those boundaries into unequal status. Economic structures could make certain Jewish occupations unusually visible. Nationalism later raised questions about who truly belonged to the nation. Racial ideology finally transformed inherited prejudice into an argument that exclusion was biological and permanent.

None of these forces operated identically everywhere.

Nor was European history one uninterrupted march toward the Holocaust. There were periods of coexistence and cultural exchange. Jewish communities flourished in many places, and non-Jews sometimes defended them.

History becomes dangerous when we flatten those differences.

The deeper pattern is institutional vulnerability.

A minority does not need to control society to become the object of conspiracy theories. In fact, political weakness can make scapegoating easier because the targeted group has limited power to resist what governments, religious authorities or mass movements say about it.

That is what strikes me most when I look across this history.

The accusations kept changing.

The vulnerability remained.