None of the replies answered my question, except to say they didn't think it through.
I think I figured it out myself. They expect they will get absolute power for Trump, martial law, pardons, and if the left (and rino never-Trumpers) doesn't like it, they can shut up.
At the inauguration, they will overpower the cops/national guard with overwhelming numbers. Trump will declare martial law. He will shut down msnbc, cnn, wash post, ny times, etc. He will fire everyone at the pentagon who opposes him. He will declare the election void. Some police and national guard will side with him. Pardons for all rioters.
I saw a Trump supporter in my neighborhood putting mountain bikes on his giant pickup truck last night. Maybe paranoid, but it just looked puzzling. Bikes will outmaneuver police and get through roadblocks meant to stop cars. Will police and national guard fire on white American citizens? They may need a lot of bullets. No hotel, no airbnb, no organization, just mobs coming in every direction.
They are jacked up and know we can't kill and jail them all. Will 100s of thousands come ready to storm police? If so, I suggest the police do not have a strategy for that.
They are aided by planning to do things that conventional people cannot imagine them doing, no more than anyone expected Jan 6.
One third of America is white supremacist authoritarian, and they have the presidency. The wisdom of the founding fathers gave Trump great power. The Constitution gives the presidency great power on the assumption that the people would never elect a person who would use it for personal gain and authoritarian power.
All you need is 1/3 of the senate. Keep firing generals and DOJ until they all go along, then you have it.