That's what they said about round-earthers. You know, those nutcases who actually thought the world wasn't flat, in complete defiance of all common decency. Glad those people were silenced.
The world needs speech it isn't used to hearing in order to think. Is he mostly nuts? Sure, but he deserves to speak as much as anyone else does.
He can speak all he likes, just not in Apple’s back yard. Hate speech is poisonous, and the analogy comparing it to a science history just fails the reasonableness test.