Israel (now broader Mid East discussion)

Thats my point. The students labeled as pro-Hamas by one source and Pro-Palestine by another (https://www.dailymail.co.uk/news/ar...hide-library-pro-palestine-demonstration.html) are likely US citizens.

I don't like threatening gestures no matter the packaging and I'm not wading into this debate to determine the accuracy of either label, but at any rate, I'm pretty sure these are Americans with the same rights we afford other groups we don't particularly agree with.
Right or wrong, if you're a guest of the country and break laws while here, you can and often will lose the privilege, meaning loss of visa etc.

If they're citizens, then they can be charged with whatever crime they commit. Physical intimidation and assaulting people is a crime and they can be arrested.

That said, a lot of college students are here on student visas and can get deported if they cause trouble while here. It does happen.