This principle was codified, I believe, in the “You’re Not Allowed to Disagree Act of 2002.” In defense of our hero, he’s just following his political instincts: He sees something that challenges his beliefs and, voila, down it goes. Think of it as the Fairness Doctrine for campus protests.
And before you ask, no, your right to free speech that he’s challenging doesn’t count. Exit question one: This sort of makes sense by Doug Kmiec standards, no? Exit question two: “If there’s a student on this campus that … might be having an abortion, might be going through this, you’re going to put this up in front of them? Are you crazy?”