Umm, no. The last thing I want is to be lined up according to my faith in a tube 6 miles in the air with some bloodthirsty Islamist asking the questions.
Turns out this pilot had honest intentions, and there was no actual harm done. But it was a very stupid request. Similar to someone asking people on the Baltimore Metro at 11pm to raise their hands if they have more than a $100 cash on them.