In one stretch of the film, Chomsky is berated for criticizing the French government and academy for punishing a professor who wrote a book denying the holocaust. In the film, several students here in the states verbally attacked Chomsky after a lecture, comparing him to holocaust deniers. It showed how the mind of the censor works.
Censorship is for the weak-minded.
It is used when we lack the fortitude to make an argument, or are just too lazy to make our case. It is an easy trap to fall into, since we are human and of limited intellect. I remember being in college, not so many years ago, and working in an anti-racism coalition trying to rid the University of Illinois of its despicable Chief Illiniwek. A fight which, regrettably, is still necessary. The university managed to find one Native American to write in support of the Chief.