re: A monument to black Union soldiers goes up while white confederates goes down. Hmmm

They fought against invasion, there was a Congressional resolution saying the war was waged by the north to preserve the union. Further, the corwin amendment was passed by Congress to protect slavery in the South to entice the South back in or at least the border states to remain in the union, they still declined. Lincoln said on multiple occasions that his desire was to preserve the union, what he did for the blacks was a means to that end. The border states didn’t secede until the invasion was called for. And there are many more inconvenient details like this. Yea the South had slavery, but let’s be fair.