I have found, after 45+ years of business experience, that business owners who claim to be Christians, are generally the worst type of people to deal with in business.
Ive worked for a few devout religious types before, not just Christians but also other faiths and found the same thing. My old man had a good saying about some neighbours that were highly religious:
"They pray on their knees on Sundays and they pray on their staff the rest of the week"