Unfortunately, it is somewhat difficult to retract a blood libel, once it has been broadcast across the world.
Jeffrey Goldberg on January 12, 2011, on "Why Sarah Palin's Use of 'Blood Libel' Is a Great Thing":
Sarah Palin has called the post-Tucson campaign of vilification against her and her fellow travelers a "blood libel." On the one hand, this is unfortunate, as Jonah Goldberg points out, because it threatens to redefine the phrase, plus, what is happening to her is not precisely the byproduct of a blood libel. ...
I mean it sincerely when I say I hope Sarah Palin, who regularly expresses love for Jews and Israel, takes the time to learn about the history of the blood libel, and shares what she has learned with her many admirers.