Argumentum ex "so's your old man" -- invalid form of argument, of the general form, "but your Honor, he needed killin'!"
The sole issue is whether the Union government and its polemarch, Abraham Lincoln, were justified in doing what they did, which was a war of conquest against free people, and the moral equivalent of enslavement (which they said they abhorred). They were not justified, they had no just cause. Whether or not Jefferson Davis had unpaid speeding tickets or four wives is irrelevant.
It’s refreshing to see a reb admirer admit that Jeff Davis’s regime might not have been led by angels in the form of slaveowners after all. As far as the legitimacy of the slavers’ rebellion, right makes might which makes more right. It’s not Lincoln’s fault that the Confederacy wasn’t run by a better class of men. They just didn’t make slaveowners and menstealers in the 1860s like they did in the old days of Assyria.
Poor southern slave owners. I'll bekieve in a true moral equivalence when the moral equivalent of slavery involves the right of the moral equivalent of the slaveowner to buy and sell his human property so as to break up the God-established institution of marriage as stated in Matthew 19:
"...he which made [them] at the beginning made them male and female... for this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh"
Thus I do not believe the "moral equivalent of slavery" was really the moral equivalent of slavery. The Confederates never caught on to the fact that there is more in the Bible than "curse of Canaan" and "servants obey your masters".