If you'd like some insight into how tolerant university campuses are of ideas they (and generally "they" is some small minority of students) don't like I strongly suggest reading
Free Speech For Me--But Not For Thee: How the American Left and Right Relentlessly Censor Each Other by Nat Hentoff*.
It is almost 15 years old now, but things haven't really changed and the practice of showing up and shouting down speakers has gotten worse in that time. Another tactic is to suggest that the ideas of the speaker are so evil that it will be hard to resist incitement to violence and getting the school administrators to simply cancel the entire event.
*If you're not familiar with Hentoff, he is no rightie, though he is an absolutist on free speech.