The city definitely has some institutional issues with race. The Bourdain episode on Pittsburgh is a good watch as it highlighted the historical issues with the lower Hill District which generally gets ignored locally. I don’t think ignorance is exclusive to or a prevailing characteristic with Steeler fans, but there are definitely some generations in this region that have refused to evolve.
Good disclaimer on Roethlisberger, though. You’ll find no bigger Steeler fan than I am and I can’t wait until he is gone. The guy is an absolute fraud and the stories of his running around in his early years are legendary for all the wrong reasons. Complete trash human being.