It may not have been “about slavery”, but the Confederation absolutely ceded the moral high ground in a strategic blunder of epic proportions when they failed to recognize that liberation of their enslaved population and incorporating their numbers in military and economic activities would have greatly leveled the field of conflict AND denied the Union that “hill to plant a rally flag on”.
That commented upon, far greater long term damage resulted when the Democrats via Wilson countenanced racism and pitting us against each other when he resegregated the civil service. Personally, I still think Biden is still trailing him a bit in “largest POS to hold public office” (resegregation, bailing out CITI/JP Morgan w/WWI entry, signing off on Federal Reserve etc…)
Donald Trump challenged that myth and opened the American dream to blacks and other minorities. Many blacks realized what had happened to them as they found success under MAGA policies. That destruction of the century old ruling class strategy earned Donald Trump eternal hatred by those who think that they have the right to rule this country. They panicked when so many of their ensnared masses started looking elsewhere for political action.
The ruling class reacted by totally opening the borders - illegally - and welcoming millions of new underclass 'migrants' ... AND the Republicans are not really fighting this grossly illegal abuse of the immigration laws. They all seem to agree that a permanent underclass is essential now - I wonder why...
We are now being sold a mythological story that now that these millions of needy people are on our soil and have no way to provide for themselves, we must support them, feed them, house them, give them medical care, take care of their children, etc. It is a 'new program' of establishing a permanent underclass. Rush Limbaugh understood.