Facebook is not exempt from the Bill of Rights. There might have been confusion about that since corporations often disregard the law. But the Israeli lawsuit just filed in NY district court to compel FB to censor posts on Palestine & BDS shows if it can be forced to censor, it can also be politically compelled to respect the US Constitution.
July 2014: Israel laid siege to Gaza. July 2016, India lays siege to Kashmir.
Solidarity rallies in Delhi, Kolkata, NYC, Hamburg, London, & elsewhere. Make solidarity happen.