I don't believe people realize what will happen if Trump gets arrested. A lot of his supporters feel they have nothing to lose. Plus, Trump himself is going to fuel the fire. This is going to get very ugly....
They actually have quite a bit to lose, as much of his base is petit bourgeois (small business owner) or else middle class. There is no reason to think these people will form an armed insurgency or terrorist cells, come now.
Having gone down to protests in the aftermath of 2020, I can tell you I was never seriously worried about these folks going postal. Even January 6th was simply a colossal failure on the part of law enforcement rather than a case of people being backed into a corner and unleashing mass devastation.