I can't see economic dead zones happening in Minneapolis.
First off, pretty much everyone here is sick of the police. University of Minnesota fired them. Minneapolis Public Schools fired them. Very few people in Minneapolis are blaming the protesters. Most people are blaming themselves for not taking stronger action against the police sooner because the police force here has been a cancer for a long time.
Second off, lots of donations already happening of time, money, and goods. So much so, that in take organizations had to turn donations away because they had no space to put the donations.
Third, we don't have have no-go zones like a city like Baltimore. My bike shop is in Little Mogadishu. Midtown Global Market is on Lake St. The best croissants in the city are in Midway (St. Paul). I ride my bike through north Minneapolis regularly. The worst parts of these "bad" areas is there tends to be more broken glass in the bike lanes and road shoulders.
When Oprah Winfrey asked Prince in 1996 why he still lived in Minnesota, he said “It's so cold, it keeps the bad people out.”
Of course, that's not 100% literally true, but there is a lot to it.
That said, we do need to think seriously about getting a grocery store rebuilt in the Lake St area before winter though. In as much as you can be fortunate about these sorts of things, we are lucky this happened in May, and not October.