I don’t expect that to come first. First they’ll go for the “illegals” which will likely be any brown people regardless of immigration status.

That will probably take them a couple years. But the outrage it causes will compel the “dissidents” to speak out and resist. At this point, they’ll really turn up the propaganda machine on them, demonizing them and making them easy targets. By the next election cycle (if we even have one by then), they’ll start round them up and it will all be over.