From what I've seen of videos posted of the vandals and looters in my own and other cities it seems a certain, very small, percentage of bad actors are provoking escalations to the detriment of everybody else. Some of these parties seem to be doing that as a primary goal, others are simply causing the escalations as a side-effect of their actions.
Certainly this doesn't account for everything we have witnessed, such as the NG shooting rubber bullets at people on their porches(srs WTF?), but it has contributed substantially to the escalation IMO.