Hmmmm. If I owned a cake shop and someone wanted to order a distasteful, to me, decoration I might tell them of a cake shop down the street that would be better at it than I.

However, if I was the only cake shop in town? Suppose the desired decoration was of testicles and a penis? Would I comply?

Or if someone wanted a menorah and I was a christian, would I object to the decoration? A swastika? Of a 'colored jockey by the door post'?

I don't know for sure. I suspect though that given the ability to dicker and compromise we would come up with an agreeable alternative. Good humo(u)r can go a long way. On the face of it I don't believe I would turn away the business even if I felt compelled to tuck a note into the paperwork stating my misgivings and suggesting an alternative for future orders.