There is no “Safe space” for that kind of speech.
It is a wonder that one of his students did not open a large can of whip ass on him!
Had I been there, I damn sure would have! There are some words that are fighting words, PC or not!
It would be kind of fun to spin him up till he slapped or hit you so you could go all rambo/mike tyson on his ass.
Then ask him if his feces tasted any better than a Christian’s. (That event would be part of the whoopass)
Think of it as a teachable moment then have a beer summit with your buddies to talk about it. :-D