1096 AD
Before the main army of the First Crusade even reached the Holy Land, a wave of anti-Jewish violence swept through the Rhineland cities of Germany. The 'People's Crusade'βcomposed of peasants and lower nobles inflamed by crusading preachingβattacked Jewish communities in Speyer, Worms, Mainz, and Cologne, killing thousands. The crusaders argued that if they were going to fight God's enemies abroad, they should first eliminate God's enemies at home.
Some bishops and clergy tried to protect the Jews, recognizing that the crusade was directed at Muslims, not Jews. Bishop Reginbo of Worms and Rabbi Ephraim of Bonn both tried to persuade Jews to convert to Christianity for protection, but many chose martyrdom. The Rhineland massacres established a pattern of anti-Jewish violence that would accompany crusading movements for centuries.
These massacres were condemned by some contemporary Church figures, but the damage to Christian-Jewish relations was profound and lasting. Key Sources: Hebraic chronicles of the Rhineland massacres; Rabbi Ephraim of Bonn; Eliyahu Bauer, The First Crusade and the Murder of the Jews of the Rhineland