The blood libel, that most medieval of slanders, seems to have found new life in the mouths and minds of those who would see the Jewish state not just delegitimized, but demonized. And yet ...

But, that has never stopped me. I told her about the blood libel — the ancient and medieval accusation that Jews would kill gentile children, use their bones for matzah and their blood for wine.

Its manifestations range from religious prejudice and medieval blood libel to racial theories and modern conspiracy frameworks. Understanding this historical evolution is essential for grasping ...