>>12161507> The Oath More Judaico or Jewish Oath was a special form of oath, rooted in antisemitism and accompanied by certain ceremonies and often intentionally humiliating, painful or dangerous, that Jews were required to take in European courts of law until the 20th century.https://en.m.wikipedia.org/wiki/Oath_More_Judaico> The Fourth Lateran Council in 1215 was the first to proclaim the requirement for Jews to wear something that distinguished them as Jews (and Muslims the same). On many occasions, Jews were accused of a blood libel, the supposed drinking of blood of Christian children in mockery of the Christian Eucharist.Source: Ritual murder in Russia, Eastern Europe, and beyond : new histories of an old accusation. Avrutin, Eugene M.,, Dekel-Chen, Jonathan L.,, Weinberg, Robert. Bloomington, Indiana. 2017-07-12. pp. 39–40.
> Antisemitism in popular European Christian culture escalated beginning in the 13th century. Blood libels and host desecration drew popular attention and led to many cases of persecution against Jews. Many believed Jews poisoned wells to cause plagues. In the case of blood libel it was widely believed that the Jews would kill a child before Easter and needed Christian blood to bake matzo. Throughout history if a Christian child was murdered accusations of blood libel would arise no matter how small the Jewish population. The Church often added to the fire by portraying the dead child as a martyr who had been tortured and child had powers like Jesus was believed to. Sometimes the children were even made into Saints.https://books.google.com/books/about/The_Butcher_s_Tale.html?id=h0EVpw4hsvQC&printsec=frontcover&source=kp_read_button 