I doubt you'll find a prosecutor in NYC who would bring that case. Even if the professor is charged he'll ask for a jury trial and not be convicted. (Don't get me wrong, I like your thinking -- but we're talking about NYC here.)
No east-coast politicians are going to tackle this case. But Senators and Representatives from the U. S. heartland might be able to take some of Columbia's federal money away. Nothing upsets liberals worse than trying to take away their government money -- it drives the crazy!
It may only require a prominent politician to call for this weasel to be prosecuted for "hate crimes" to put the fear of God in these ingrates. Fear is a powerful thing. I don't mind what these people think as long as they don't say it and by doing so allow themselves to be used by our enemies to demoralize our troops or sway political decisions.