The reason I didn't want to pick out specific examples is because each choice could be nitpicked, because I haven't done any systematic study, and because my point is that college administration has changed over the last few decades.

The issue isn't "if the students get violent on campus, the campus gets violent in response", it's that recent history shows that even if students stay non-violent, the campus still gets violent in response, eg. https://en.wikipedia.org/wiki/UC_Davis_pepper_spray_incident .

It is hard to stay non-violent when the power structure opposed to you becomes increasingly violent.

FWIW, I recall student protests during the 1990s to deplatform Henry Kissinger due to his war crimes and abuses against humanity. There were student anti-war protestors in the 1990s too - I seem to recall Stanford students were opposed to her becoming provost. I'm also sure that if I looked I could find students opposed to a visit by Kurt Waldheim, due to his association with the Nazi Party.