When Sarah Palin used the term “blood libel” in response to the shooting in Arizona that left six people dead and severely injured others, including Democratic Representative Gabrielle Giffords, she stirred a controversy. To defend herself in the midst of the controversy, Palin defined the term “blood libel” very broadly as “being falsely accused of having blood on your hands.” Despite her broad definition, blood libel is a term that refers very specifically to the historical accusation that Jews killed Christian children to obtain their blood. A false accusation, to be sure, but one with a long and painful history, marking centuries of Jewish-Christian relations.