One thing I have noticed is that a lot of those speaking out against censorship themselves have no problem censoring polite comments in their own comment sections.
I wonder if there are any meaningful differences between an individual's comment section (even if on a public-facing service such as Twitter), where that individual chooses what to censor, versus a corporate behemoth like Facebook choosing to impose censorship on all users of its Messenger - where the mediator of communication decides what to censor, regardless of what the participants want.
Because censorship that most people fear is the power of the state stymying information flow and not private actors acting freely of their own accord. It’s when the states monopoly on violence gets leveraged to censor, that you see things like genocides, tyrannical acts, with no rival powers to combat them. If you don’t like Facebook, go use another site or build your own, we are blessed with that freedom. Facebook has the right to curate content for its users.