As part of the enclosed nature of this society, most Minnesotans have tons of lifelong school friends. It's virtually impossible for an outsider to meet people unless they follow a few specific personal patterns -- mainly the suburban family person or chattermouth partyhopper who inherently sucks up to the Minnesota ego.
Minnesota seems to pride itself on this self-centeredness. I don't mean to change the subject too much, but Minnesota has lost four Super Bowls. So what do people with this distinction define as "loser"? Someone who comes from Buffalo, New York?
Perhaps dreary Buffalo is Minneapolis' true sister city.
I suppose the Minnesota attitude is fine within the State boundaries, but in the real world it's hard to get by on this basis. Especially since the Minnesotans who would hurt an outsider's feelings with such an attitude are generally the exceptions to the rule. What it amounts to is that most of this kind of conceit is found in people who really don't merit it.
There are actually clubs for newcomers to Minnesota. The main one in the big town is Twin Cities Transplants. Maybe more newcomers should look into this. But most outsiders who've come across problems in socializing would be flabbergasted to even check it out. They figure if the typical Minnesotan is the kind of person they're trying to meet, it may not be worth the effort.