Wouldn’t you know, there are still hard feelings in parts of the US about what happened, and the fight is still fought. And Jim Crow and segregation weren’t protectors of large amounts of wealth and power, just social structures and power in urban enclaves. You’re going to face a hell of a lot more resistance with what you propose. This would be more akin to the end of slavery than the end of Jim Crow, and that took a civil war.