, the First Amendment only protects us from the government's interference. We as a society reserve the right to tell you to sit down and STFU if stupid falls out of your mouth. You are under no obligation to do so, and we can't legally enforce our STFU order, but we can most certainly publicly shame and shun you if you don't comply. Further, Facebook is not a governmental entity, and it is well within its rights to set the rules by which you use its service. If that means squelching what it sees as hate speech, then it can certainly do so. You don't have to use Facebook if you disagree with the practice.