It seems like to like metal you have to hate hip hop. A lot of metalheads say rap isn't music or it's just noise. It's possible to like both genres. Why so much hate?
Because it's a stupid genre. Such things exist. Metal is going in the opposite direction to stupid music. We don't want stupidity near us. Why do you want stupidity near you? Are you stupid?
Brimming with hatred, but it's true: some music is designed for a simple purpose, which is to distract simple people. By definition, nothing interesting will come out of that (unless you, dear reader, are stupid, in which case knock yourself out).