you and your bigoted buddies psi and ginwilly can feel free to bawl your eyes out that your bigoted ways are unconstitutional, you'll be on the losing side of history and remembered for the vile bigots that you are.
when states won't stop denying service to blacks or gays on their own, that is when the federal government needs to step in to stop your hateful, harmful, racist practices and assure equal protection of the law since you won't.
this concept is anathema to racist southerners like you, but common sense to the rest of the nation.
The south has never been unique in racial segregation, descrimination, nor enslavement; it is just that the south was historically the only place that had minority populations of significant number. In 1900 life was not so great for blacks in Boston or Chicago either.
The south is/was probably a few decades behind the north (everywhere else) in terms of racial equality.
New york, for instance, had slaves until the 1830's, so the south was ass holes for having them after 1840? Under political conditions most favorable to the south, slavery does not survive the 19th century.
If the south had ended slavery on it's own terms, there would not have been a Jim Crow. Jim Crow was a direct response to the forced emancipation of the souths property/slaves.
We will never know for sure, but without question the War of Northern Aggression was harmful to race relations in the south.
All that being said, the south has caught up with the rest of the country in terms of race relations. I have heard the N-word spoken one time in public, loudly and in anger by a white person in my living memory. And the black people were doing dumb stuff, and deserved insult.
Racism is alive and well, I'm not saying it isn't, but it is outlawed, but it persists everywhere and in equal amounts.