> Although the president was caught on mic musing about deporting American citizens

The canaries in our coal mine are permanent residents. Anything that can legally be done to a permanent resident can basically be done to a "bad" citizen. Trump is trying to run roughshod over permanent residents' habeus corpus rights. Courts are currently pushing back; I expect he will defy them. That, for me, will be the line at which I'll start helping with civil disruption.