I am surprised the residents and business owners haven't tried to put a stop to it. Either by protesting to the police and city goobermint or by going to the roof tops and painting the streets with protestors brains. I think a few heads exploded by a .223 hollow point would deter them.
To me, the answer is obvious. The city and surrounding area is a leftist hellhole where the population has been indoctrinated to be completely subservient to the state. If rioters and leftists come in to burglarize, destroy, loot, burn, and commit murder, those "people" (I hesitate to call them Americans) are perfectly fine bunkering down until the mayhem subsides.
But as we have seen, the mayhem doesn't subside. So they'll continue to bunker down. You know, like Joe Biden in his basement.