Should bakers or florists be able to refuse products or services to the mentally disabled? (Maybe they feel uncomfortable around them, or believe they're possessed or something?) How about people who are missing arms or legs for whatever reason? (Maybe they believe that their body has been defiled or something?)
Having a license to sell products or services to the pubic doesn't mean you get to refuse to do so because you don't like their hair color or height or number of toes or way they style their hair or shoe color or religious symbols or ... Wrapping prejudice in a bow of religion doesn't make it less offensive and it doesn't mean it's acceptable.
Selling a product or service to someone doesn't mean you have to like them. It's not an endorsement.
FWIW.
Cheers,
Scott.