They themselves have said they should. They actively censor their platform and enforce an editorial policy on the basis of their own business interests, nobody

They themselves have said they should. They actively censor their platform and enforce an editorial policy on the basis of their own business interests, nobody made them do that. The Signal IM program is also run by a company. Unlike Facebook you could argue that what they're running is infrastructure. They aren't trying to say censor Alex Jones to be more appealing to advertisers. Facebook is fully within their rights to run their company like that, but they can't expect to also have governments view them a common carrier when they're anything but.