The ‘Escape From New York’ prison model looks better all the time. Just build razor-topped walls around the Democrat cities and let nature take its course. Strategically-placed monthly airdrops of food and ammo would help things along.
I envision all of Islam like that. Fence 'em all in and see how long it takes until there is no one left there to take the census. The only thing the world has not tried to eliminate terrorism is to quarantine the whole nest.
Deep down in your hearts you know that's the only solution for eradicating terrorism from the civilized world. Let 'em export oil and sandbags for survival.
And yes, I'd be in favor of exiling all incorrigible thugs, bullies, murderers, rapists, etc., along with all maximum prison populations to a designated walled city and let them create their own pecking order.