None of these people have been convicted of anything. It's not a judicial punishment. Furthermore, some of them aren't even immigrants. https://www.latimes.com/local/lanow/la-me-citizens-ice-20180...

Fundamentally, America has given the right - no, demanded - that police do "papers please" stops on people, and given them the right to detain them indefinitely until they produce papers. This is like a mandatory ID card system but without the benefits or coherent organisation.