While I do in all honesty respect where you are coming from, I find it highly unlikely that the federal government will start dragging people out of their homes and ordering their execution when I wake up tomorrow. There were precursors to the Holocaust, and if you are concerned about an event like that happening again, you should probably look into them. Whats the old saying "History repeats itself".
One of the most powerful "weapons" of totalitarian regimes is simple disbelief that "this can't be happening" and "they can't do that."
The "precursors" are only obvious in hindsight. Some people sounded warnings. Most people ignored them. Kind of like now.