It doesn’t have to be violent, but it has to be direct. You want to “deport” US citizens? You’ll need someone to drive the bus full of people to the airport, someone from the airport to open the gate, someone else to fuel the plane, a mechanic to sign off on the plane, two pilots to fly the plane, and at least three separate air traffic controllers just to clear the plane out of US airspace. It just takes one of those people to say no.

Which just means mass protests aren’t big enough. It’ll take a while, but eventually they’ll realize that with enough mass mobilization missing work and going into debt become irrelevant.