"It's an old saying, "Don't make the perfect the enemy of the good." It means to not be so determined to see perfection in human endeavors that we fail to recognize the good that is there, the good that has been accomplished. It's a recognition of reality. Yes, the Ideals we have are there to spur us on. I have argued here that Absolute Goodness is real, but I also have argued that ours is an imperfect world, that we cannot achieve paradise here, no matter our efforts. It's not punishing ourselves when we fall short, as we will."
I agree with this 100%, so it was obviously just a wording issue. You have to be pragmatic in your quest for unattainable perfection.
Oh, yes, right, let us all remember that these men were humane to the men women and children they claimed as their property. Good grief. I have no doubt that there is also humanity in North Korean labor camps - what of it? It remains a great evil.
I think you've got me wrongly pegged in your second and third paragraphs there. Race relations could surely have been not much worse than they were under white rule. If rebel slaves were militarily successful, they could have forced concessions from the federal government, including the abolition of slavery. If slaves had been armed, the legacy of Reconstruction might not have been reversed with Jim Crow.
It's all counterfactual, again, but I think it's a bit of a jump to just say that a slave rebellion would have been a bad thing on the whole.
I think your version of the "stability" of the south forgets the daily hardships of the black population. Peace for the whites would end, to be sure, but for the black slaves it could hardly have gotten much worse.