Negative Ghostrider, You're 100% wrong on this.
It is, both morally and legally, that youngster's right not to stand or to pledge allegiance to the US. He gets to stay, and he's still a citizen. A country that requires you to pledge yourself to it to be a citizen can't call itself free. Furthermore, what the hell good is a forced declaration of allegiance? You couldn't possibly expect someone to stand by a coerced pledge. I wouldn't.
Having schoolchildren stand and make a pledge they are unqualified to understand the significance of is one of the creepier things we do as a country. If this kid has thought about it enough to decide he does not wish to pledge himself to the US, that's his absolute right, and I hope he at least appreciates that he lives somewhere he has the ability to make that decision. As a proud American, what we should be doing is asking the youngster why he feels he shouldn't recite the pledge, and either educating him on the uniqueness of the U.S., or helping him figure out ways he can help fix the faults he perceives. That's how you make involved citizens, not browbeating them into mouthing empty platitudes* to their teachers.
*If you browbeat the kid into saying it, then that pledge is an empty platitude.