That's an interesting citation. It isn't a campus event so you still haven't provided a single example of the right using violence to suppress free speech on campus. More below.

"I will concede that attempts to curtail freedom of speech on campus comes mostly from the left."
ok so you have gone from 2/3 of the attempts being from the left to "mostly" the left. That's progress. Until you can provide some examples of the right doing this (the list of things given many posts ago) on campus I think it is safe to assume 100% of the anti-free speech actions involving violence on campuses comes from the left.
Now about your citation... they start by misrepresenting it as a pro-Trump rally. It was not - as described many posts ago. Then it basically tries to represent the violence as being equal. I took the trouble to watch several hours of video and the vast majority of the violence was from the antifa (left) demonstrators. Continued...