So, would an Auburn fan be wrong for ordering pizza from the Pizza Hut in Foley since their sign outside says "GO JULIO ROLL TIDE" every Saturday that Alabama plays? Or do business with any business in Foley that mentions support of Julio, only the second player ever from Foley to have any sort of meaningful college career?
I think everyone answered your question pretty clearly. There's nothing wrong with a community rallying around a native son, or daughter, or team. However, when you're in a populated area with a large portion of that community being fans, or supporters of the other team, you have to decide how you need to handle it if you choose to ignore, or exclusively support one over the other. Pulls at people's strings. It's not rocket science.
The question I'd ask you, is while it's okay for an Auburn guy to order a pizza from that Pizza Hut, will it be possible for one of the bammer supporters in there to NOT say something about the Auburn customer's shirt, hat or whatever? I'd venture to say that 5 out of 10 times, they couldn't keep their mouth shut on the subject. I believe also, that 3 out of those 5 would say something disparaging, or something belittleing their support of Auburn over Alabama. Just a guess...and my opinion, but certainly based on experience.