Do you have a specific critique of political correctness you want to point that finger at, or are you just watching too much South Park and confusing PC Principal for a person, rather than a satire.
Blackhawks / Indians are offensive because, when most other teams are using animals - you're using a minority - which equates them with animals / sub-human. You create mascots and imagery that reduce them into cartoon caricatures:
Do you understand why that is inappropriate?
I don't believe that anyone has a right to not-be-offended, but there is a legitimate argument for not needlessly denigrating people and cultures. It's one thing if it's a racist / inappropriate joke (I believe in giving great leeway to humor), it's another if it's plastered all over your city.