Forcing Facebook et al to become nationalized so they can't legally moderate content as they wish wouldn't somehow lead to an intellectual revolution in Iran - authoritarian governments already block Facebook and other Western platforms, and if they didn't, those governments would still insist that they follow local laws (including censorship laws.) So we would be flooded with Iranian propaganda, anti-semitic memes and shit that we couldn't legally stop, while Iran would still be persecuting dissidents.