There's not an ideology behind this except Anarchy. It's all coming down, no rhyme or reason.
But there is a reason. To demonize the Republican Party and conservatism in general from Trump on down. Revisionist politicians, professors, and most damaging the Media - with one goal, the Nazification of the Confederacy and then tying the conservatives to the forces of evil and darkness. Their game plan goes something like this: Slavery was evil. The soldiers of the Confederacy fought for a system that wished to preserve it. Therefore they were evil as well, and any attempt to honor their service is a veiled effort to glorify slavery. The blatant use of the race-card in order to inflame the masses and turn them against anyone speaking out against removing statues.