I can't find anything from a remotely unbiased source on "facebook hires censors" other than this: https://www.popsci.com/Facebook-hiring-3000-content-monitors
Which is basically just content monitoring that AI can't do... child exploitation, hate speech, gore, pornography, etc.
I think it's a pretty damn right-wing slippery-slope you're traversing if you assume that's equivalent to "censorship of rogue ideas"