Why do some people enjoy bullying autistic people?

I try to be nice to people, but some people just seem to bully me and treat me like shit. It's almost like some people deliberately like bullying people who are nice. Are there just people in this world that are just evil human beings who like bullying people who seem innocent and vulnerable. Why is it that NT's seem attracted to people who are obviously assholes. Whenever I see someone who acts rudely I try to avoid them, while everyone else seems to think they're cool. I really don't understand this trait.