Answer: Anti-Semitism in the Middle Ages.
Explanation:
Medieval Europe was not tolerant of others who had different religious attitudes and beliefs. Stereotypes towards Jews have not changed much in the modern period either. The Jews were thus placed on the margins of medieval society.
During the Middle Ages, they were forbidden to engage in many trades. So they turned to trade and tax collection, and therefore a stereotype was created that they were moneylenders. With the outbreak of the Black Plague in Europe in many cities (e.g., Freiburg in Germany), it was believed that Jews deliberately poisoned wells so that they were expelled and killed for it.
The Catholic Church accused the Jews of betraying Jesus. That has created a stereotype of people who cannot be trusted. It was not until 1964 that the Catholic Church dismissed the allegations.
