[AndyJackson]

Our dean—a diehard liberal—admirably condemned it but said free-speech principles tied his hands. The campus groups had the legal right to pick or exclude speakers based on their views. The bylaw remains, and 11 other groups subsequently adopted it. ...

Free speach means you can ban the speach of anyone you disagree with. Campus Groups are under the charter of the University of California which is the 4th branch of the California government under the California state Constitution. You are bound under the 14th amendment to recognize all other amendments.

It's not hard unless you have abandoned the Constitution.

[Verginius Rufus]

By coincidence, the University of California was founded in 1868, the same year that the 14th amendment was ratified.