Don't you agree that political correctness is destroying our society?

I mean like in the recent UCLA rant video, the girl was branded a "racist" just because she commented about asians' bad manners in the library (like talking loudly on their cellphones in the library). Come on, isn't that a library? If you want to talk on your cell then talk outside nobody's stopping you. You get what i mean? It seems that nowadays you can't comment let alone chastise on people's bad manners and bad etiquettes because doing so will make you either a racist, homophobe, sexist, misogynist or a bigot. So don't you think that all these political correctness bs is destroying the morals of society?