As a Nirvana fan I enjoy this.There's no need to be rude if you dislike it. You are allowed to dislike nightcore just don't be rude about it. You can jam to Nirvana songs without feeling the need to say rude stuff about people who sped it up.
Not people literally getting mad because the song is Nightcore, I legit saw someone say rock is not supposed to be Nightcore. Newsflash, any song can be Nightcore whether it's country, pop, or rock. It just means the song is sped up and sometimes songs sound even better sped up so if you're mad just don't listen to it? 💀