Absolute worst reconstruction era possible?

The post-civil war era reconstruction period didn't go over as ideally in hindsight but how could it have been much worse?
 
Well, by making the reconstruction even more radical, you could trigger various destructive affairs: decades of occupation in the south, white guerillas, egalitarian land reform for freedmen*, black governors appointed by Washington, military dictatorship under Grant, economic stagnation, decline of immigration to the US... that would be a hell of a TL and you would wish the reconstruction was more moderate.

*This isn't bad per se, but in the context it just adds fuel to the fire.
 
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