People have said Josh has an extremely narrow view of the world because he's obsessed with lolcows and ecelebs and they are what shape his understanding of other people, such as, as somebody else already said, thinking Ethan Ralph and Nick Rekieta each represent a demographic.
I believe this warped worldview is why he has a seething hatred of anime watchers. Now, it would be a thing if he hated anime, that's perfectly normal, we all have a type of entertainment that we can't stomach no matter how hard we try. But his hatred is more specifically directed at anyone who watches it. He thinks they're all trannies and/or pedophiles because to him, the people with KF threads who watch anime represent ALL anime fans in the world.