Neither religion nor atheism are the cause of bigotry; to say that believing in evolution makes you a racist is the cheapest of cheap shots; its a blatant attempt to induce guilt by association.  Evolutionary theory does not equal racism.  It is ridiculous, as is the belief that all six point six billion people on the planet need to assimilate into the oh-so-perfect culture of Christianity lest they face in infinite punishment for their finite crimes.