The men on both sides of the American Civil War eventually forgave each other to a large extent.
The aging Confederate veterans of the late 19th and early 20th centuries wanted the good aspects of their legacy preserved.
Such commemorative and reconciliation monuments were allowed in a spirit of reconciliation of the regions of the Republic.
Such monuments were never intended as praise to Slavery or its onerous practices.
Such monuments were intended to remember the bravery and heroism and independent spirit of Southern soldiers.
The recent actions of Democratic regimes (the Biden Admin, et al) in hiding or destroying those monuments are despicable.
Personally, I'm a Northerner my broader family lost a great-great-uncle who died in Union Blue and Kennesaw Mountain.
Had I lived as a young man in the 1861-1865 time frame I would have been a Union Man through-and-through.
Both for keeping the Union together AND, as it evolved later, to eliminate the scourge of Slavery from our Home Soil.
But, like so many Union Men, at the end of the War and beyond, I would have been fine with setting up those monuments.