Ok. So, apparently having particular Bible verses mentioned on your t-shirt is sufficient to meet the bar. Note, that you've also already done some wiggling here. The standard the judge set was not "change or leave". You've already walked that back. The standard the judge set is no bigots here. Are you or you not walking back your former defense of the judge?
But anyway, assuming you are not, suppose at a tournament someone shows up with a T-Shirt that reads, "Assembly of God Annual Youth Convention 2013 - "For we can do all things through Christ who strengthens us." Now, you (the judge) are ok with that shirt, presumably. But the theoretical gay guy who was feeling threatened comes up to you and says, "Errr... that bigot over there in the T-Shirt makes me feel really threatened." And, maybe you aren't as savvy as the first judge (you did have to look it up), and you go, "What? I don't understand." And he says, "Well, he's a religious fundamentalist. He takes a literal reading of the Bible, and I happen to know that they recently made a public stand that marriage is between a man and a woman. He's literally believes I deserve to die because I'm gay, and he scares me." So the judge goes over and says, "Say, do you believe that the Bible is the literal word of God?" And the guy says, "Yes. I do." And the judge says, "So, you believe Romans 1:28-32 is literally true then?" And the guy says, "Well, yes. I believe all scripture is the inspired word of God." And the judge says, "And you believe marriage should only be between a man and a woman." And the guy says, "Yes, of course. That's what the Bible says."
And the gay guy is standing there watching you. So now what?