There's assholes in every demographic. A lot of concert-goers and forum-dwellers are just elitists. You can find the same kind of people residing in any music genre.
SAYS THEY ARE LAID BACK AND DOES NOT JUDGE PEOPLE; UNLESS YOU ARE A SWAGGER, HIPSTER,INDIE KID,CHAV, EMO, PREP OR EVEN IF YOU LISTEN TO NU METAL OR METALCORE