You are correct and I knew that, but as I was typing on my phone I left some clarification out. My mistake. That said, my point remains. You win on MN and WI and I agree with you there. While historically correct on Michigan and Michigan State, only the oldest UND fans remember that. A live rivalry really doesn't exist with any of those teams with anyone under 50 and many over 50. Also, other than MN, you have no local game (Duluth, St. Cloud, etc.) which I believe is important to the fan experience. I think the regionalism of conference affiliation is a big deal for the fan experience, and you'll lose that in the Big10.
But even more than that, I'm concerned that UND would get short shrift in other matters from that arrogant conference.