Blocking campus access to students based on their perceived political beliefs and religion, is not something colleges should encourage or allow.
Disrupting classes due to the curriculum, or disrupting club activities due to the topic or guest speaker, is not something colleges should encourage or allow.
Students should have the right to make their political beliefs heard. Even offensive ones. But they don't have the right to decide that parts of campus are off limits to Zionists, Jews, Conservatives, white people, etc.
Such behavior should bring harsh sanctions.