blue on blue: as in blue states/counties/constituencies dupes attacking each other. AKA the left eating its own, to mix in yet another metaphor.
own goal: “(in soccer) a goal scored inadvertently when the ball is struck into the goal by a player on the defensive team.”
Ahhhh. You are correct. I think this whole dust up is really going to bite the liberal collegiate class in the butt. Major donors who have some class will see the leaders of these institutions for the lame weak folks they have become.