It's not that people want to write them out of history.
It's that people don't want to celebrate them.
Being that there are enough idiots down south who say "the south gonna rise again!", hate the United States and want to overthrow its government, go back in time and make sure the "rights" people have are limited to white people, straight, and mostly male, I figure it's a great idea to take those modern statues down and put them in a museum with plaques that explain why they were put up and why they were removed.