source 1 source 2 source 3 source 4 source 5
In Left Illusions (2003), ex-Marxist David Horowitz describes similar responses from the Academic Left whenever he was scheduled to deliver presentations at various U.S. universities. Horowitz studied at Berkeley.
BTW, in the Reuters article linked above, watch out for “fakestream” media bias. The news agency refers to UC-Berkeley as a “liberal-leaning” school when, in reality, the social sciences faculty are a bunch of post-Soviet Marxists and PC totalitarians. At the same time, they incorrectly brand Yiannopoulos as a “far rightist” (i.e., fascist, etc.).