MV from Fringe Bowl Team wrote a blog post about 10 years ago about how intense college football rivalries are. I'm trying to find it on the wayback machine.
Minnesota's rivalries with Wisconsin, Iowa, and to a lesser extent the U of North Dakota vary greatly depending on what part of the state you're in.
I don't have a lot of heat towards Iowa myself, but it gets very ugly along the I-90 corridor. Many friends of mine grew up in rural southwestern Minnesota, and those that came to Minneapolis for college have a much deeper and more visceral dislike of Iowa than I do. Oddly enough, Iowa State is a popular destination for Twin Cities-area high schoolers for studying engineering.
One reason why there is so much heat towards Wisconsin is reciprocity. Some years ago, the Legislatures of Minnesota and Wisconsin came to an agreement to allow students to attend college in the other state and only pay the in-state rate while doing so. As such, the outstate UW schools (most notably Stout, Eau Claire, and LaCrosse) are very popular destinations for Twin Cities-area students. Likewise, a large fraction of UMN undergrads come from southeast Wisconsin (the Milwaukee burbs, Madison, Green Bay, etc.). They tend to bring their childhood Badger gear with them to college, and then wear it to the Axe game, and elsewhere around campus. Between this and some awful losses to the red weasels during undergrad, this used to make my blood boil. Add in the stupidity from the Brewster-Fat Bret era that has thankfully been dialed down, and I was getting REALLY pissed off losing to Wisconsin.
But then, PJ's Gophers brought the Axe back from Madison in 2018. You have no idea how much bad juju that win resolved on the Minnesota side.
Since then, between that and my mellowing in my old age, I've gotten a lot more zen about how wins and losses affect me. I still love watching college football, both on TV and in person. I enjoy pregaming. And I am grateful for the friends I've made along the way, including many on this forum.