Impressive. I guess it is up to you and me, Adonia, to save western civilization. No one else seems interested at this point.
In my mind, I was thinking that special ops types could gradually filter into the area, driving rental cars, no more than two in a car. In order to avoid suspicion, they could disguise themselves as women, maybe even hookers (Clyde Barrow used to do it, driving all over Dallas dressed like a woman while being one of the nation's ten most wanted). At a given time, the power grid could be taken off line for a few hours during the night and electronic communications could be interrupted, giving the rescuers time to arm and move into place. When the power comes back on, bus loads of regulars could go in to surround the affected area and provide back-up for the special op troops. I would imagine that a lot of house to house searches would have to happen. Troops would need to have authority to fire on rioters in order to be effective. Tear gas and rubber bullets could be used unless they proved to be ineffective.
It would be an awful mess because of the danger posed to innocents. Protesters who provide cover for violent offenders are not to be considered innocent.
Logistical support for the troops is another matter. Food, sanitation, and supplies...how on earth would that be handled in the heart of a big city?
Am I serious about all this? Just take it with a grain of salt. I am just trying think of how I would retake a urban stronghold from armed dissenters.