Why do plp get so offended when you like another state team for sports, etc?

I never understood this, I live in Wisconsin, and if you don't like the Packers or the Brewers, you are seen as an alien or shunned. WHo made it a rule that just because you are from a state you have to honor that team or lifestyle? I am sorry, I don't watch football, or baseball, and even if I did, I think the Packers and Brewers suck! You are expected even as a female to like football and the Packers and everyone, it's so annoying, cuz I keep in what I really think: THEY FCKEN SUCK!!!!! WOO HOO!! FCKEN CHEESEHEADS!!! Ok, had to get that out LOL!! Now I better get a bullet proof vest.