Why do White Supremacists believe that the White Race is pure?

They are dumb, I agree. But am I racist or a neo Nazi because I think blonde hair and blue/green eyes are attractive? Therefore I have blonde children with blue eyes? It's not an Aryan race. It's of Anglo-Saxon descent. Which is from when the Germans invaded and occupied England. Any white European descent is of Anglo-Saxon. Don't be so full of yourself that you turn a blind eye to the fact that blacks and hispanics are also racist. I've been called names and looked at with disgust and I don't think other races are superior for them looking down at me. I think they're jerks and then I become prejudice and wonder why people like you don't question the actions of your own race.