All these colleges are learning the wrong lesson from COVID. You don’t keep the right people out because of an infection; you get rid of the infection, by any legal means necessary.
There should be a massive mobilization of Guardsmen surrounding and removing these encampments. Follow the tactics of MacArthur in 1932; in that case you could argue that the veterans had a valid gripe, but in this case it’s anti-American insurrection (where have we heard THAT before?).
It's up to Governor Newsom to order the National Guard to restore civil order.