It depends on a couple of things: if you are living/working in the US -and- the camp is NOT owned and operated by a religious organization or church, then the supervisors words would be prohibited harassment based on religion and could be reported to the EEOC. Should the above two conditions (in the US & not religious owned) apply and the supervisor was to actually take some action against you due to religious reasons you could then file charges and possibly suit through the EEOC and the federal court system. I have twice in the past notified the EEOC of prohibited questions I was asked during interviews.
Once in the early 1980's which resulted in the company being fined and the HR manager replaced, and again in 1999. At this interview for a manufacturing QC position at a small parts plant I was actually asked "do you know Jesus?" About six months after making the report to the EEOC the word got back to this little manufacturer's main customer who pulled their business and basically shut down the place.
If it was a Christian summer camp, you betcha it's legal.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.