If we were to look into the histories of other peoples, what historical lessons do you suppose we would find, in peoples who've tried to eliminate their current problems, which they see as having been created by who they'd once been (and might, to some extent, still be), by ignoring or removing any and all reminders of their present and past faults & failings? If Stalin, the USSR and George Orwell's 1984 didn't immediately come to mind... then maybe put the matter into more personal terms: what do you suppose a psychologist might tell a patient, who's attempting to repress their unpleasant memories? Does denying and repressing your failings sound like a psychologically healthy idea? What do you suppose will be accomplished, by an entire nation of individuals, frenziedly tearing down, and kicking(!), those statues, which remind them of their past and present faults and failings?
You do not change the future by ignoring the past, you only bring it back to life, behind your back.
I'll grant you, it might aid the Democrat party, to not have so many reminders of what the Democrat party stood for, before and after, the Civil War, and publicly well into the 20th Century, but I'm doubtful if doing that favor for them, will have much benefit for the rest of us.
I have no love for the figures that had first been named, Teddy Roosevelt, Roger B. Taney, or any of the figures of the Confederacy. While I recognize that TR was a 'larger than life' figure, I despise him