Notice you ignore the blacklist, which is the more relevant point.

As far as Chomsky goes, this is actually a great illustration of the problem. I think he's a Communist, you disagree. Well guess what- a lot of the 'protestors' in Charlottesville were white Nationalists with Nazi overtones, some were hardcore Nazis, some were dabbling alt-righters. So who decides which or any of them gets to protest/speak? You, me, the government, Google?

Its not just a slippery slope, its an avalanche of stupidity to try to do viewpoint censorship.