“Highly debatable—imho he was a clown—a rebel without a clue.”
Chomsky’s politics had nothing at all to do with his linguistic theory.
I had conservative Christian friends who considered his theory of universal grammar to be an important contribution to their apologetics work. They had no idea that Chomsky was a radical leftist until I mentioned it to them.
I’ve read that most if not all of his linguistic theories regarding real natural languages have been either superseded or discarded. His biggest impact has been on computer languages even though that was not its intention.