Minnesota Nice = Swedish Nice...and we see how well that is working out.
More German than Swedish in MN. Almost 4 times as many Minnesotans trace their ancestry to Germany than to Sweden. Sweden even falls behind the the Norwegians and the Irish.
https://midwestweekends.com/plan_a_trip/history_heritage/heritage_travel/german_towns_traditions.html
Probably more Swedes and Norwegians in Minnesota than any other state though, so they do probably have more effect on the Minnesota culture than any other state.