I will stand on two points for you.
1. There is no proof that he is a Bama fan, other than his own admission of such, which is worthless.
2. No self respecting Bama fan would wear that shirt and it would likely fall to another fan base to do something so ignorant and make a claim they are a Bama fan.
Lastly I will point out that as has been stated, all fan bases have dregs of the earth on their fan base, yours especially, so as was stated, cast a stone from your glass house if you must, but dont be shocked when that glass house comes crashing down.