The only thing I can really say to this is, is before Milo was big he was literally untouchable by normal means of arguing much in the same way Trump did it through his campaign. It was endless deflections, attacks on character, etc. (trolling stuff). The issue was that his speech began to gain traction, and what used to be words slowly began to trickle into action by his following. His speech wasn't defeated because we finally convinced him of common sense, it was just the people controlling his ability to speak took it from him. If you want to talk about quashing his speech, look at him right now. He lost his status, his job, good portions of his base, some of his outlets for speaking. All of those are essentially people taking active roles to stop the dude from speaking whether it be at a conference, in a book, or on a website.