I love George Carlin, but I strongly disagree with this premise.

First off, it only regards political correctness through the narrow dimension of the censorship of bad words. Defenders of political correctness actually prefer this definition because it's not obviously unreasonable to scold people for using gratuitous language which hurts feelings without saying anything important. But that's not what political correctness is. Political correctness is when an idea or fact is met with punitive reprisal because it undermines an ideology. The n-word is just a slur. To speak it is to be rude. To be politically incorrect is to note that black people commit the majority of homicides despite being only less than one-seventh of the population. The Bad Words framing of political incorrectness permits phony displays of fake political incorrectness, such as when the writers of South Park have a gay character use the f-slur in a speech affirming homosexuality as valid.

Also, political correctness is not "fascism". The term itself and its practice come from the far-left, not the far-right.