Board Thread:Warhammer 40k General Discussion/@comment-24037808-20140924094901/@comment-14745711-20141002010245

Perhaps, but the purgation of as mutations as possible from the human geanome, as well as the fact that they have a policy of killing all alien life forms, even ones like the Tau who didn't actually do anything to harm them. Racist is probably the wrong term, but it is the best one I can think of.