Besides, the roads that his supplies are shipped to him over as well as his finished goods delivered, the police department which assures that his business is safe and secure, the fire department that protects his property, the court system that's available to him when he wants a contract enforced, etc, all of these are paid for by the taxpayers of his community, state and country. He's only able to even be in business as a result of the 'commons' provided for by taxpayers, some of whom are the very individuals that he thinks HIS religion allows him to discriminate against.
Despite the 1st Amendment, there are limits on what someone's religious rights allows them to do. Look at what happened to that cult leader out in Utah a few years ago who was basically enslaving young girls or a year or two ago in Michigan where they tried to pass a law that would allow bullying in school if the parents of the bully demonstrated that their religious beliefs made it OK for their child to intimidate and/or physically abuse classmates who were LGBT.
And keep in mind that back when the 'Loving v Virginia' case was being argued before the Supreme Court in 1967, the state of Virginia used the Religious Freedom argument as part of their defense of the state's anti-miscegenation statute, banning interracial marriage. This law, similar to the ones in 15 other states at the time, not only refused to recognize interracial marriages as being legal, they actually would then prosecute and imprison couples under a state law that also made cohabitation illegal, another statute based strictly on religious grounds.
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