Courts have generally held that the paramount first-amendment right is the right NOT to speak. The government can't force Facebook to let other people commandee

Courts have generally held that the paramount first-amendment right is the right NOT to speak. The government can't force Facebook to let other people commandeer its megaphone. This has been clearly decided in caselaw that the judge quoted amply in his decision. This also isn't new to social media - just because a newspaper has a "letters to the editor" section, doesn't obligate them to publish every letter they receive, or even to be fair and unbalanced in the choice of letters that they do publish.