That article doesn't cite any cases showing that the first amendment or any similar constitutional provision applies to non-citizens abroad, and it makes an arg

That article doesn't cite any cases showing that the first amendment or any similar constitutional provision applies to non-citizens abroad, and it makes an argument about the Muslim ban that has since been rejected by the Supreme Court's upholding of the ban. It's definitely true, however, that foreigners in the US have that right, as do US citizens abroad with respect to US government actions where the US government knows or should know that they're a US citizen.