What factors that existed/occurred that contributed to growing resentment/hatred of Jewish people in Europe?

The term anti-Semitism was first popularized by German journalist Wilhelm Marr in 1879 to describe hatred or hostility toward Jews. The history of anti-Semitism, however, goes back much further. Hostility against Jews may date back nearly as far as Jewish history. In the ancient empires of Babylonia, Greece, and Rome, Jews-who originated in the ancient kingdom of Judea-were often criticized and persecuted for their efforts to remain a separate cultural group rather than taking on the religious and social customs of their conquerors.