Nonsense. You are seriously mistaken if you think mere legality will stop them.

This regime has already illegally stopped, assaulted, arested, jailed, and/or deported multiple US citizens. They now stop people and demand they show citizenship papers, and the AsstDirFBI has said people must carry proof of citizenship at all times, and if not, ICE are free to abuse you under the presumption you are an illegal.

We are already under a "May I see your papers, please?" Nazi-like system.

Except without the superficial politeness of the "May..." and "...Please" and seeing the face of your accusers who hide behind masks.