They hate it because they think people are stupid for listening to a song they dont even understand...They think that everybody knows english? Because the answer is no.. People around the world listen to english songs and sing along to it even they dont really understand but u dont hear them saying (in their language) "Why are u listening to that song? U don't even understand english"
Kpop is still a part of the music "world" so whatever haters say, They can't stop us from listening to it just because we don't understand it.
sorry for the ranting