Much campus censorship rests on philosophical underpinnings that go back to social theorist Herbert Marcuse, a hero to sixties radicals. Marcuse argued that traditional tolerance is repressive—it wards off reform by making the status quo . . . well, tolerable. Marcuse favored intolerance of established and conservative views, with tolerance offered only to the opinions of the oppressed, radicals, subversives, and other outsiders. Indoctrination of students and “deeply pervasive” censorship of others would be necessary, starting on the campuses and fanning out from there.
If that isn't the very description of lefties today, especially their talk about the so-called Fairness Doctrine, I don't know what is.
Go read the whole thing.