> Also, under fascism, speech may be protected in government contexts, but if the government turns over large swaths to corporations, and the corporations aren't required to protect speech, that's not the government's problem.
Corporations aren't required to host all speech, or be subject to any kind of government control in what speech they host (short of taking down illegal content like copyright violations and cse). In fact, requiring someone or a company to host speech is a violation of the 1st Amendment, because it is compelled speech. If you run a forum, and you ban someone for views you don't like the government can't step in and say "no, you're required to host this content". And legally, there's essentially no difference between your hypothetical forum and Facebook.
The only exceptions to this are utilities. An electric company can't just decide to stop doing business with someone that they don't like, since most customers have one choice for utilities. Laying electric wire, plumbing, etc. almost always requires approval from the government to in some sense utilities companies are indirect arms of the government. There's arguments to be made that hosting providers and domain name providers should be moved into this category. This would mean that a website can't be kicked off the internet as was the case with the DailyStormer for a while. But it seems like an extremely far fetched argument that sites like Facebook should be considered utilities.