The narrative today is:
Slavery was wrong; anyone not an ardent abolitionist has exactly no moral authority on anything at all.
Trying to explain anything beyond that is futile in my experience.
Within 25 to 50 years anyone who owned slaves, condoned slavery, or did not advocate abolishing it during that era will be as much of a non-person to history as the Germans and Japanese have made their WW2 leaders and military.
when will the Democratic Party get woked and go away. They were the slave holders and racist in later years. Still are.
When will BLM and LeBron James start picketing the Democratic Party?