MN black population from the 2010 Census was 8%.
The chart looks to be showing about 8%.
I think that is true in most states... it is all about the demographics of the outbreak. Take New Orleans. They do a demographic for the whole state but I bet if you broke it down by parish, you would find the infected follow the general population demographic. Currently the hardest hit areas In Louisiana also happen to be the highest black demographic. In MN it’s the opposite as you pointed out.
So... the reason this matters in my opinion, is that the left is desperate to make this Trump’s Katrina. In GA the new narrative is Trump and our governor hate black people and are letting them die from a disease that mainly affects blacks. That isn’t playing out when you look at it state by state... only in places that have breakouts in a large black population.
So, they are using this misinformation as a political weapon, and at the same time using it to push for universal healthcare (because why let a crisis go to waste)