Rights group files lawsuit to block Trump deportations of pro-Palestinian protesters

[Bayard]

1. Per VOA,

"In immigration court, the burden of proof is on the government; it must show the person violated immigration laws. In a case like Khalil’s, ICE attorneys will ask for deportation, but they will have to prove he is a threat to national security."

https://www.voanews.com/a/under-what-circumstances-can-a-us-green-card-be-revoked/8009714.html

Even a green card holder should have free speech protection, so what proof do they have that he's a, "threat to national security?"