Earlier quoted context omitted.
Enough with this “known terrorist” nonsense. Verbally expressing support for terrorist groups is still protected speech.
It's protected speech if you're a citizen, but it's not clear to me that non-citizens, especially when they're at the border rather than within the country, would be so-protected.
sorcerer-ma’s comment made it sound like we are speaking of Mahmoud Khalil and others.
I am under the impression that the settled law is that 1A applies to everyone physically present in the country.