If someone were to hire you to perform a task, and you were to learn that this client was a Mormon, what would you do? If doing business with a Mormon is so hateful to you, the honest thing to do would be to simply state “I don't do business with Mormons.”, and turn him away.
Business isn't built on honesty..
It seems to me, based on remarks that you have made here and elsewhere—which show the nature of your professional ethics (or lack thereof) and your moral character (or lack thereof)—that the most likely thing that you would do would be to accept the job, and then perform as many subtle acts of malfeasance as you thought you could get away with; taking the client's money, but leaving him with a badly-done job, in ways that you'd hope he wouldn't notice right away, but which would later cause him considerable trouble.
Again, you can have moral character without belonging to a cult. Frankly, I've seen your morals, which mostly consists of trying to rationalize your racism and misogyny and homophobia with religion.
I do a good job for people because 1) That's what I'm paid to do and 2) I really want them recommending me to others. That's how I grow my business.
Now, as a buyer, I've had to fire vendors.. but it's usually been for a good cause. Like that time that a customer refused to ship my product because he had an ongoing dispute with the accounting department. Turns out it was his own fault, because his own bookkeeping was sloppy, but I took the time to work with accounting to resolve the issues, and then I pulled all future business away from him. No explanation, he knew what he did wrong.