You are being obtuse. Following your definition, freedom of speech wouldn't exist in anywhere other than in the U.S. because no other country has a constitution with that exact same wording!

lki876 is clearly referring to a philosophical principle, not whether Facebook's policies violates the U.S. constitution. There was probably some law legalizing Trump's murder of Qasem Soleimani too, doesn't mean it wasn't also a dick move.