Don't get me too wrong. Anti-semitism was rife in Europe and Asia.
However this strain proved particularly virulent.
It was horrific everywhere. Including in Roman Catholicism. After all, while Luther is noted for antisemitism, it isn't the Lutherans who are continuously labeled as anti-semites for accusations of blood libel.
Lets just suffice it so say, NONE of Christianity did its job towards the Jews in the Middle ages. Fair?