Its not america's history. America is a baby compared to the rest of civilization, thousands of years old. Not only that but the shear mass and accomplishment involved.
Yep it is not US history but the Woke in the US are intent on destroying as much of history as they can get, not dissimilar to Australia, NZ, Canada and the UK.
In a World of Woke people and Self Gratification by Proxy, let us be thankful that some historical monuments are beyond their control. Even if they were built by slaves, no matter what the Progressive's say, think or do, they cannot destroy them. Yarra Man