That's a basic tenant of fundamental Christianity. The business owner's inherent belief system is such that he feels a person who has accepted Jesus Christ as his or her personal savior is superior to some one who has not. That's a basic tenant of fundamental Christianity. No Jennyb, that idea is not found anywhere in Christianity. You will might very well find some favoritism in this persons workplace, but that is no different than any other environment.
Favoritism is a part of life.
The difference is that Christianity teaches us to love one another as God loves us - and God loves us all equally, regardless of whether or not we believe in him. If that's their goal, I applaud them. Yes, in theory, God loves us all equally, regardless of our beliefs. It takes all kinds, even on the side opposite yours. No Jennyb, that idea is not found anywhere in Christianity.