You made mention of the status of blacks and women (as if women were more emancipated in the South?) and “that moral high ground wasn’t so high.”
If you want to debate the consequences of the war for liberty (if you feel it directly led to the centralization of government, the end of the previous arrangement, reliance on Washington, whatever) or on the various legal questions in the matter—fine.
But if you’re going to start doing the old Leftist tactic of invalidating people’s moral beliefs and human rights because that society wasn’t perfect by your standards, then don’t be surprised when someone responds to that nonsense.
I made no such argument. I responded to a fallacious attempt to claim a moral high ground by applying the same standard to the North that was being used to judge the South. One cannot claim that secession was invalid on the grounds that blacks didn't get to vote on it without also accepting as invalid every public act taken by the northern states.