Removing Civil War history sets up a dangerously undereducated populace, malleable in their youth, that can be made to dance as puppets for the radical leftist leadership.
Made into slaves.
The left tends to blame long dead southerners for the neo-Nazis in Charlottesville, a piece of opinion that defies the logic of even the most ignorant of Americans.
Except for the dangerously undereducated populace. The slaves.