That is also a factor, but I'm going to interpret this as tell-tale signs of a breakdown under economic stress.
I can't see a train of thought that starts with a century of injustice and ends with "therefore I should loot Target". I can very easily see a link from "I can't afford stuff because my job just vanished" to the burning and looting.
[0] https://en.wikipedia.org/wiki/Twin_Cities_protests#Day_3:_Ma...
But in particular I don't believe that the protestors are worried about police vs forestry fatality statistics.
It might be possible that the quarantine and economic hardships are a factor at play, but the ultimate causative factor is that non-white Americans are tired of both the veiled and bald faced racism and mistreatment that is a daily issue.
The protests aren’t just about cops killing black men; they’re about every single aspect of daily life being made more difficult because of constant racism and abuse.
But the stats aren't really relevant here; the issue is that there is a video going around in which official appears to brutally murder someone in cold blood. And a sneaking suspicion that justice won't be served. And a large population suffering under an uncertain non-economy for around 2 months now.