To be fair the civilian leadership likely is a bunch of cowards content to let whatever burn unless it’s directly relevant to them. Sure they could give a rat’s ass about the police precinct (after all, they tow the line of fuck the police mostly) but when the mob’s outside their mansion or state office you think they’d care about “duty to retreat”? Pffft, no it’s game on then.
To the overall question I’d say it’s a mix of both. The police and national Guard have a duty to try and keep shit from getting waaaaaay out of control using what means they can that doesn’t offend public sensibility. I agree letting a platoon go out and turn the streets red would do much more than really kick off something far bigger. I think the citizens that actually reside in the town should have a vested interest in ensuring it’s not burned to the ground and be allowed to help, so long as they too are not just indiscriminately shooting folks.
Guy making off with sneakers? Let’em go.
Guy with a Molotov? Drop that motherfucker