They are free to leave the US and stop empowering our enemy with their taxes.
Oh you think so, hmm?
You think that a lot of us haven't been looking at every country that might be worthwhile, including spending years learning additional languages, researching our ancestry several generations deep to find countries where we might be able to get ancestry, applying for literally dozens to hundreds of jobs on literally all other continents, and even taking IELFS training and tests and looking at industry changes for jobs just to be able to get out?
It's not as easy as you think. Even Canada and Mexico have strict requirements that a lot of the people in the U.S. can't meet.
Literally the closest comparison is the people who wanted to flee Nazi Germany.