It absolutely is, but colleges don't need to sponsor it, for the most part that hateful and derogatory speech has pretty much zero redeeming value.  Folks like Milo Y and Ann Coulter are pretty much just angry people who do their best to spread hate.  They are free to say whatever they want, but college students should have some say in what their tuition dollars go to sponsor.  That being said, the rioting in Berlkey was just stupid.