The First Crusade (1096) began an era of massacres of Jews in Germany as the nearest representatives of an execrated opposition faith. Entire communities, like those of Trier, Speyer, Worms, Mainz, and Cologne, were slain, about 12,000 Jews are said to have perished in the Rhenish cities alone between May and July 1096. Alleged crimes, like desecration of the host, ritual murder, poisoning of wells, and treason, brought hundreds to the stake and drove thousands into exile. Jews were alleged to have caused the inroads of the Mongols, when the Black Death swept over Europe in 1348–49, Christians accused Jews of poisoning wells. In the wake of this accusation, a general slaughter began throughout the Germanic and contiguous provinces, …
Editors. "Jews are persecuted in Germany". The Literary Encyclopedia. First published 01 March 2010; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=9457, accessed 19 April 2015.]