Yeah, let's fire the professor.

Why not, are you afraid of hurting someone's feelings?

I think it's rather a matter of being an unproductive line of discussion. One of the key points to take from this article is that throwing your toys out of the pram because you disagree with others' viewpoints is counter-productive at best and illiberal at worst.

I'm vehemently opposed to the kind of activism described here, but 'if you don't like it then fuck off' is exactly the wrong attitude and will not solve this problem.

There comes a point, though, when you may have to say that they are disrupting the proper functioning of the university enough that they have to go, for the good of everyone else...