Religion and business are 2 completely separate things, at least to me, but not to the US Supreme Court.
I can accept religious "businesses" (ie churches) being allowed to refuse people that violate their faith. HOWEVER, as far as I'm concerned and despite the Supreme Court ruling, businesses should not be allowed to discriminate.
As I pointed out in my previous comment, only gay people are legally allowed to be discriminated against.
You aren't allowed to discriminate against an interracial married couple, even though the bible and many other holy texts say you can't marry outside your own. The bible was used to justify slavery, and still is in many places, based on the "blackness" being the mark of Cain.
That's the problem, every other group is protected except for LGBTs.