I walked out of a tire shop once when I got bumped back a spot in the line-up when a buddy of the management came in. Christian Businessmen Association signs were all over the place, and it was clear they knew each other from church. Had a hard time getting the guy to return my keys. I kept repeating, 'They are my keys. Not yours.' He gave them up when I threatened to call the cops just to get MY keys back.
I narrate this story just to illustrate that for some people it really does matter to them, and its more about religious affiliation than we might want to think some days.
If I was in business, I'd try to keep religion right out of it totally. It should be about business alone.