The Supreme Court has said, in a case out of Birmingham, Alabama that you can not discriminate against African- Americans in public accommodations. Katzenbach v. McClung, 379 U.S. 294 (1964). Ollie's Barbecue refused to serve Blacks because of race. This was discrimination based on race and was based in part on the Commerce Clause of the United States Constitution, and interstate travel and commerce.
That is NOT an accurate statement of the law or that famous court case.
The Katzenback case did not deal with the Commerce Clause/U.S. Constitution standing alone as some kind of independent legal right or claim against Ollie's BBQ.
That case had to do with the application of the Civil Rights Act of 1964, its scope and power and how it could be applied to "public accommodations." In other words, at issue was the constitutionality of the Civil Rights Act of 1964 itself, and the constitutionality of its application to Ollies restaurant.
Every legal scholar knew then and knows now that it was an EXTREMELY stretched version of the Commerce Clause that was used as the alleged basis of power for Congress to even pass the Civil Rights Act of 1964. Even AG Bobby Kennedy thought it was a bs stretch and argued for Congress to dream up a different basis of alleged Congressional power to pass that law.
Of course, the "progressive" used the bs "affectation doctrine" and the bs "cumulative affects" doctrine to uphold the Civil Rights Act of 1964 and its application to the Bham restaurant. >>> There is no "affectation" doctrine or "cumulative affects" doctrine in the Commerce Clause. That comes from what is called "progressive" and "evolving" constitutional theory that says federal judges SHOULD by judicial fiat and bias amend the Constitution via judicial decision making. We saw that in Roe vs. Wade and the Obergfell sodomite cases.
>>>Now here is the next point: that 1964 Act has never been amended to add "sexual orientation" or anything of the sort. So the Civil Rights Act CANNOT be legitimately applied in the baker case.
The ENTIRE basis of the queer cake case is based on the 666 Colorado statute (this is why such laws should be rejected by the states) and the bs 666 Obergfell decision.
https://en.wikipedia.org/wiki/Katzenbach_v._McClung