You are using logic. These are Stupids. Honest to Goodness RETARDS! They don't see that 4 years of rioting, with a supporting administration in Portland, has bought them nothing. The police, that they want to destroy, is the only thing keeping them alive, literally. If the police leave, even for a few days, Antifa will be shot, the bodies thrown in the Willamette, to float out to sea.
The REAL problem is that once the shooting starts, all those who support Antifa will have to be shot. And then, those who supported the supporters.
And then, what happens to the Constitution? Antifa is the Enemy of the Constitution. Can we Constitutionally exterminate them? (And that is the only thing that will turn them off.)
The police, that they want to destroy, is the only thing keeping them alive, literally.
As one meme I saw indicated, the anti-police rioters better hope that they fail, because the rest of the population doesnt have any rubber bullets.