I think the point's best made by
411A in the second post on this thread - "AA at it again". I'm a Christian and I know I should be evangelising when I get the opportunity, but to do it as the official spokesperson of AA (which is what the captain is, like it or not, to that group of people) is just inappropriate unless it is the specific policy of his airline.
I take it, btw, that it isn't a policy of AA?