A Banal First Amendment Fact Pattern At Wayne State
https://popehat.substack.com/p/wayne-state-professor-steven-shaviro
https://popehat.substack.com/p/wayne-state-professor-steven-shaviro
Also (reading only this post), first amendment protections do not protect against non-governmental retribution. It would be employment laws and regulations that would cover the required reasons for dismissal.
I'm sure you're correct, "but" I'd think that applying consequences to someone deliberately creating dissension and discord* wouldn't be first amendment relevant. He said what he said for shock value. I'll go back to my peanut gallery now. ;)
* (I meant to use the word, "disruption." School administrators cannot allow disruptive people to disrupt the campus.)