I have to disagree with this as well.
The Consitution served to limit the government. It defines what the government can do and what it cannot do. There is an understanding in the Constitution that in the eyes of government, all men are created equal (the lack of a ban on slavery works against this and was a tremendous flaw in a great document -- but I accept idea that the document sees all men as equal).
However, private business transactions are pretty much outside the scope of the Constitution. That document isn't about what businesses can do. It's mostly about what government can do (which is very little) with the understanding is that there is a great deal that government cannot do. And I maintain that telling a business owner who he must serve is not something that is covered in the Constitution.
I agree here also...The Constitution is for limited FEDERAL government....States, individually, need to take into consideration some of the responsibilities being “stolen” by the Federals....for power over all...