Gutzon Borglum was the sculptor and was involved with the KKK. He was chosen because he was the sculptor of the "Shrine to the Confederacy” which was the inspiration for Mount Rushmore.
Guess it shouldn’t be too surprising given the way the land was taken from the local tribes despite it being sacred.
Credit to this comment by u/alcoholicorn that drove me to look it up.
Anyone with a history book on US knows the revolution was about extremely rich people wanting a country of their own to rule, so they didn’t have to pay taxes to the royal family, which it propagandized as a people’s rebellion. It was a war among the colonists about who gets to loot the riches of the land.
So it isn’t a surprise, they’ve kept their initial agenda above everything and everyone else.