Everything you really need to know about the protesters is contained in this sentence: "Shame on the College Republicans for inviting this fascist thug and provoking such outrage on our campus." In other words, the act of inviting a controversial speaker is worse than violence against that speaker . . . oh, and the speaker must be a "fascist thug" because he doesn't agree with the writer's left-wing sensibilities which are typical of Columbia students.
Her protests that "this is not an issue of free speech" makes it all that much clearer that that is exactly what the issue is. The protesters do not have an "equal right" to shout down a speaker, much less to assault him or his entourage. The right answer . . . the only answer acceptable in our country . . . is to let him speak and then set up your own event to tell everyone why he was wrong.