Feinstiens Support For Antifa

Breitbart has an account of a debate between Diane Feinstein and Eugene Volokh on the topic of the hecklers veto vs actual free speech. Naturally Diane backs the brownshirts in black shirts:

Feinstein countered by suggesting that public universities might not have the resources to handle a protest on the scale of the Berkeley riots that erupted before an event featuring former Breitbart editor Milo Yiannopoulos in early 2017.
“How should a university handle this,” Feinstein asked. “No matter who comes, no matter what disturbance the University has to be prepared to handle it…To me the extraordinary circumstance is when people come in black uniforms and hit other people over the head.”

Riot cops wear black uniforms. Protesters wear black shirts. It's an important difference. Especially when the university administration sides with the black shirts and tells its campus police (blue shirts) to stand down. At that point the speakers and those who would hear them are in danger, cannot be protected, and are asked to leave for their own safety.