Because I'm certain a sizeable proportion of the US population would agree that it is intolerant.
It doesn't matter.
Religious freedom doesn't come before the civil rights of gay people. Gay marriage is the law of the land in the US; if your business can't service the needs of its citizens because of your religious beliefs, perhaps you shouldn't be in a position to be serving the public. It's really that simple.
It's literally the first right in the Bill of Rights. I'm not saying anything about gay rights, just that freedom of expression lays the foundation for all other rights
It doesn't matter.
Religious freedom doesn't come before the civil rights of gay people. Gay marriage is the law of the land in the US; if your business can't service the needs of its citizens because of your religious beliefs, perhaps you shouldn't be in a position to be serving the public. It's really that simple.