I totally get why people in the thread are raising the sentiment that free speech is a core tenant of a democractic society that is worth protecting, regardless if you're a private entity or a government.
However, democracy itself is actually an exceedingly fragile system, more so than many people realize. We have lived in a golden age for democracy for centuries now, but that actually only represents a tiny blip on the time scale of human existence, which naturally tends towards tyranny.
What we need to protect above anything else is the democratic systems and institutions that make free speech even possible at all. And sometimes that means placing restrictions on forms of speech that seek to destroy the very foundations on top of which free speech protections is built upon.
Without those limits on free speech, it'd be a very realistic possibility for those who are in fact against free speech to co-opt it to gain enough power to then turn around and abolish it. I think we'd all agree that would be the worst possible outcome, considering all the progress humanity has made on this front.