Some good points that add value to the overall theme of history in general, that everything is nuanced.

However, there is not much more clarity possible in CSA V.P. Stephen's Cornerstone speech:

"Our new government is founded upon exactly the opposite idea; its foundations are laid, its corner-stone rests, upon the great truth that the negro is not equal to the white man; that slavery subordination to the superior race is his natural and normal condition. "

Not a lot of wiggle room there. Not much nuance.

https://www.battlefields.org/learn/primary-sources/cornerstone-speech#:~:text=Our%20new%20government%20is%20founded%20upon%20exactly%20the%20opposite%20idea%3B%20its%20foundations%20are%20laid%2C%20its%20corner-stone%20rests%2C%20upon%20the%20great%20truth%20that%20the%20negro%20is%20not%20equal%20to%20the%20white%20man%3B%20that%20slavery%20subordination%20to%20the%20superior%20race%20is%20his%20natural%20and%20normal%20condition.