Rock fans? All people can be terrible.
the problem with rock fans is that they exemplify some of the worst aspects of herd mentality, toxic masculinity, and being completely full of shit. rock fans will say stuff like, "oasis is objectively bad", and you'll ask why that's true, and they'll say "they just are; you can just tell". it's the most obnoxious, irrational bullshit in the world. there isn't really any good rock or bad rock; it has always been a simplistic and reductionist, more "heavy" current of pop music (calling itself an opponent of it) appropriated from black people and exported around the world. people's like or dislike of rock music generally depends, more than anything, on whether their friends like it. so while it's one thing to say, "i enjoy the beatles and i do not enjoy oasis," it's a completely different thing to say, "oasis is garbage because i say so."
e.g. i knew a professional rock music critic, and at no point did he ever give off the slightest impression that there was anything to what he did. he just wrote stereotypical masculine bullshit masquerading as "reviews" of old rock albums, got paid, and then constantly complained about his life. it's like, you get paid to make up bullshit out of thin air, what are you complaining about?
tl;dr rock fans are a great example of why people are so terrible in general.