Right. First of all it's about business or individual rights to discriminate or choose, not state laws requiring segregation. Second, it's about gays not blacks.
The badly and hastily written Post-Civil-War 14th Amendment was aimed at doing away with state forced segregation of former slaves - blacks. That was this amendment's ONLY purpose which was confirmed in the 1873 Slaughterhouse cases. But in the 20th Century, activist courts seeking to enlarge government power have sought to continually expand the original intent of the amendment. But there is NOTHING in the Constitution allowing the federal government to interfere with an individual's freedom to discriminate or choose.
Why do we keep talking about the federal government here, I ask myself? Dang man, this is a state issue in Arizona. Maybe it's because the federal shadow looms so large these days that states are intimidated by the threat of the feds interference. But the feds have no constitutional authority to interfere here whatsoever.
Well, the 9th and 10th Amendments seemed dead and frankly the states did nothing to hinder that.