However, I’m still not sure how spouting off about subjects they know nothing about signifies that someone is hostile to free speech. In fact, just the opposite, I would think. 
I mean, we’ve all experienced the urge to say to someone, “I wish you would just shut up.” I’ve had that urge many a time on this forum, but am usually pretty good at not following through on it. What I think happens on many college campuses, including no doubt, some in New England, is that some people project that same urge onto everyone they disagree with, thus causing them to equate every slogan they hear as an affront to their own right to free speech. Besides, let’s be honest, if students couldn’t spout off about a subject they knew relatively nothing about, most undergraduate colleges would go out of business.