Some suggest this kind of political rhetoric may have contributed to the shooter's motivations.
In an interview with Fox News Channel on Monday, Palin said she's being wrongly criticized for using the words.
"A group of people being falsely accused of having blood on their hands, that is what blood libel means. And just two days before I released my statement, an op-ed in the Wall Street Journal had that term in its title, and that term has been used for eons. So again, it's part of that double-standard," said Palin.
Palin also defended the crosshairs map that appeared on her website. Palin has removed it, but said in the past, Democrats have used similar images.