In my many years of performing live I am sure that all the audiences had a wide range of beliefs differing from mine. I was there to perform music not exchange ideological beliefs.

If they do not expect you to believe as they do, then it's just a gig. If they do say sorry, no can do and let them decide on whether they still want you to play for their congregation.
Terry

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jam on,
Terry http://imjazzed.homestead.com/Index.html