Well, despite the first amendment there is no such thing as freedom of speech in America. You’ll find that out when say something a wealthy person or company doesn’t like and drags you through expensive trials. Unless you can financially weather that storm, class-action lawsuits to the rescue otherwise.
But Facebook should do better. It should seize the opportunity to deploy a new operating system for humanity, away from the totalitarian monism of absolutism it implements today. For no system in conflict with the operating-system of evolution will survive the test of time.