Actually no, they're not. There is no ideology of racism or hatred in leftist ideology while these very beliefs comprise the fundamental views of right-wingers. I'm not suggesting that there aren't violent, ugly people who profess to have a left-wing ideology. There are. But unlike the white supremacists, it is not an essential part of their ideology, nor is racism widespread as it is on the right. You'll never see a left-wing rally promoting racism.