Michigan's fans tend to be a pretty arrogant and entitled group. Look at the meltdowns over the past few years and people currently arguing that OSU's dominance over the past decade is due to Tressel's cheating. (Not saying that the meltdowns and cheating accusations are wrong, just that we Michigan fans tend to be arrogant, whiny, and entitled drama queens when things aren't going well.)
There isn't a fanbase in the country (heck, in the world) that doesn't say/do those things. We are no different than anyone else. Name me one "reasonable-minded" fanbase and I'll direct you to their Rivals/Scout board during the season.