content: I'll comment further.  Modern racial understanding did not emerge until the 19th century (with writers like Nietzsche and politicians like Bismarck). This is when the term anti-Semitism was first invented by Wilhehm Marr, in an attempt to answer the Jewish Question under a modern lens.  Prior to this, the Jewish Quesyion was always considered a religious/ spiritual issue. The Jews were those who rejected / hated / killed Christ and shouted "Let his blood be upon us and our children" as recounted in the Gospels. Middle Ages Christians saw this and understood that anyone whose identity was inseparable from hatred of Jesus Christ, the Lord and Logos of the universe, would unsurprisingly be revolutionaries and subversives. That was the intellectual perspective.  The common man saw that Jews were the ones charging usurt and ruining families and so every once in a while Jewish homes would be burned down, since that's where the records of the debts were.  It had nothing to do with racism, not back then.