That's fine if you want to beat around the bush and avoid addressing them, but the fact remains that the situation in and similar to Plessy vs Fergusson existed under the govm't they set up. It took the 14th, honesty and adherence to it's intent to correct them.
If your argument is now that the founders didn't know what they were doing and it took some idiots in the late 1860s to fix what the founders did, then you're a kook.
If those idiots in the late 1860s did anything, it was centralize power in Washington D.C., gave the government control over every aspect of our lives, and saddled us with confiscatory taxes that exist to this day. If that's your idea of the perfect country....then you had best go back to school.