Blood_libel Blood libels are false and sensationalized allegations that a person or group engages in human sacrifice, often accompanied by the claim that the blood of the victims is used in various rituals and/or acts of cannibalism. The alleged victims are often children.Some of the best documented cases of blood libel focus upon accusations against Jews, but many other groups have been accused throughout history, including Christians, Cathars, Carthaginians, Knights Templar, witches, Wiccans, Christian heretics, Romani people, Mormons, neopagans, Native Americans, Africans, atheists and communists.