It's not a "rewrite of history;" it's a documented fact.  I realize thinking (that's haaard) and actual facts don't matter to Trump supporters, the KKK, Nazis and White Supremacists, but this is really, really simple.  No grade school or high school edumacashun required.

http://www.salon.com/2016/03/04/why_republicans_blaming_democrats_for_the_kkk_are_profoundly_wrong/