NotTerfNorCis is right to remind us of 2011. Many of the looters were opportunists who had plenty of money and nipped in for some free shopping. Remember the well-heeled idiots posting images of their haul on social media and crying in court later, shaming their appalled families?
Civil unrest turns to this sort of chaos. It always has and always will. The US has a lot of work to do to get to the sweet spot where policing by consent of the general population is established, but that is the only way policing can work in a democracy.
All societies need policing but they need policing well. The answer to civil unrest in the US has always been more policing, more weapons, more incarceration; never better policing.
I myself never saw a better behaved, more laid-back city than Copenhagen, and I was struck by the way police officers there mingled with the morning and evening crowds, chatting and smiling. US police forces are so stressy and edgy and when those ghastly over-reactions happen, they tend all to yell conflicting orders at the same time, making it impossible for their target to hear and co-operate. Have you noticed how no officer ever seems to be in charge of the others? It's a comprehensive failure of purpose, leadership, training and practice. They seem to be on a hair trigger the whole time.
I know when I travel in the US I keep a clear plastic envelope on the dash of my hire car with passport, UK licence, car hire papers etc in full view. And I rehearse my response in case I'm stopped by police. " Yes, officer, everything is right there in that packet. I'm going to keep my hands still right here on the wheel while you reach in for it." It would never occur to me to plan like that in Australia or Europe. My US-based DD laughs at me and says, "Mum you needn't worry, you're not the demographic!" which tells you all you need to know.