Ok.
I’ll become a Fighting Irish fan.
There are so many offensive team names if we carry this to its conclusion:
Green Bay Packers is offensive to real meat packers.
Pittsburgh Steelers is offensive to real steel workers
New Orleans Saints, Los Angeles Angels, and San Diego Padres are all offensive to the Catholic Church and other people of faith.
Dallas Cowboys is offensive to real cowboys.
Minnesota Vikings offensive to Scandinavian people.
All the animal themed nicknames are offensive to the animals.
Milwaukee Brewers is offensive to real beer brewmasters.