...opened her idiot mouth last night. “Blood libel obviously means being falsely accused of having blood on your hands,” Palin whined to Sean Hannity. Um... not quite, Sarah:
Actually, it's much more than that. It's a historic and defamatory slur on an entire group of people, meant to demean, and even more, dehumanize them. It's not simply being falsely accused of having blood on your hands, otherwise anyone falsely accused of a crime could claim "blood libel," and that's not what it means by any stretch.
But I suppose if you're not that bright, mock education, have never properly mastered the English language, and use phrases that your speechwriter gives you without really knowing what they mean, or having any notion of the history behind them (does anyone seriously believe that Palin knew the history of the phrase—please), then yes, you might be confused about the meaning and usage of "blood libel."