Nazi's are very stupid dumb people, and even if you ask them what they believe they themselves don't even know because thoughts and ideas scare them. So to understand their beliefs we must ask it ourselves and try to be as dumb as they are.
Fortunatly for you dear listener I'm the smartest dumb man to ever exist and as such can look deep into the idiot mind of the Nazi and beg the question, "Why do you you hate people so much?"