Nine year old girls have large enough nipples to become visually erect under t-shirts? Who knew? If that had happened (which I doubt), putting a bra on the kid would have solved the problem.
Who thinks that kind of t-shirt is "churchy"? If the camp had been run by the local mosque, would he have put his kid in a t-shirt that said, "Not all Muslims are Terrorists but Most Terrorists are Muslims"? Would he have considered that "mosquey"?