Crusader massacre of Jerusalem, July 1099
When the First Crusaders took Jerusalem on 15 July 1099, they killed most of the Muslim and Jewish inhabitants over two days. The Jews who had sheltered in a synagogue were burned alive inside it, and chroniclers boasted of wading in blood up to their ankles on the Temple Mount. Montefiore uses the episode to show sanctity turning into a licence for extermination: the city's holiness to the conquerors made clearing it of rival believers look to them like purification rather than atrocity.