Leftist Students Embrace Nazis and Segregationists

EXAMPLE 1: Yale students form a human chain to block a Jewish student from entering the University

Do we have a historical precedence of this happening?

EXAMPLE 2: UCLA Jewish student trying to attend class is forcibly prevented entry by 6 masked Pro-Hamas students while UCLA guard stands by and DOES NOTHING. “I am a UCLA student…my class is over there. I want to use THAT entrance. Let me go in.”

Do we have a historical precedence of this happening?