Bzzzzzzzzzzzzzzt. Wrong. Gwt off the island.
Blood and libel are two words strung together most prominently first applied to the Romans who blood libeled Christians in regards to the Holy Eucharist. Supposedly the evil Christians were using Roman children for the blood component of the Holy Eucharist in the early Second Century AD. Which, of course, predates the Middle Ages and certain Christian blood libeling of Jews.
Ridiculous. The association of the term “blood libel” with the dawn of anti-Semitism in Europe is so well established as to be undeniable by any serious historian. That cannot be changed by googling the term and trumping up a silly counter-argument whereby Christians become the poor victims. To present such an ahistorical and offensive argument is borderline anti-Semitic itself.