Same here. I have a passport but I don't carry it when I'm in the United States. If stopped on the street, I could not prove that I am a U.S. citizen.
If we were doing this by the book, any person found standing on American soil would be presumed to be standing there lawfully. As such, the presumption affords them the liberty of continuing to stand there unmolested. To deprive someone of that liberty requires due process. That begins with individualized reasonable suspicion, but must continue through the process before action can be taken. The Trump administration doesn't even bother with reasonable suspicion. It has simply declared an entire vaguely defined group not only to be removable, but also criminal.
I don't think they'll stop there. Once you establish that ICE can do whatever it wants in pursuit of "illegals," and once you've floated the idea that the worst American citizens can be "deported" (i.e., made subject to the immigration's punitive infrastructure), ICE will simply become the American Gestapo.