Why can't you grasp that the OP is talking about the general inability of progressives to even tolerate opposing viewpoints?
It's an inability that most of our population suffers from.
I'm fine with calling them out for being closed-minded, and quite illiberal. But I think it's dangerous to conflate PC censorship, done by private citizens and business, as a violation of free speech. And not just as a technical legal matter. A media outlet making decisions about what it will, and won't, publish IS free speech. It's just free speech you disagree with.
That said, the anger of the culture wars is fueling fascist yearnings on both sides. It's a real danger.