As an American and a staunch defender of the First Amendment, I’m allergic to the notion of forbidden speech. But if government is going to forbid it, it damned well better clearly define what is forbidden or else the penumbra of prohibition will cast a shadow and chill on much more speech.
Perhaps it's not what people are saying so much as platforms are accelerating it algorithmically? It's one thing for someone to foment sedition, praise Hitler, or yell their religious screed on the public street corner. The problem comes when powerful interests in the form of governments, corporations, or others provide them with megaphones and tacitly force audiences to listen to it.
When Facebook or Youtube optimize for clicks keyed on social and psychological constructs using fringe content, we're essentially saying that machines, bots, and extreme fringe elements are not only people, but that they've got free speech rights, and they can be prioritized with the reach and exposure of major national newspapers and national television in the media model of the 80's.
I highly suspect that if real people's social media reach were linear and unaccelerated by algorithms we wouldn't be in the morass we're generally seeing on many platforms.