I reject mindless, wholesale destruction of statues, but:
What if the intent and effect of a statue is to erase, rewrite, or even repeat history? What if 50 years after WWII, neo-Nazis in Germany had had a major political resurgence and were reasserting control over Jews and erecting statues of Hitler? Could these statues suggest to people that Hitler is worthy of admiration? Could they mitigate the realities of Nazi defeat? Could they encourage Lost Causers to hang on to ambitions for a return to the past "glory" of Hitler's Nazi Germany? Could the statues intimidate Jews, as if to say" 'we're back or we're still here right here in your town square, so we are far from defeated?" Would it be wrong for Jews and other decency-minded people to declare that the Hitler statues need to go? Could you blame Jews for tearing down these statues if government officials ignore their complaints for decades? Would anyone argue that we need the Hitler statues to remember the Holocaust and WWII, or would books, movies, TV, museums, classes and lectures provide sufficient memory of the evils of Hitler and WWII?
With regard to our present situation, I would note that Northerners learned about the Civil War without having a statue of Robert E. Lee in their village square. Some northern communities have statues of Union military figures, but if the Confederate statues are about remembrance of history, shouldn't statues of Union (American) generals and leaders be plentiful in the Southern states, to remember who won the war? Wouldn't Union statues help remember which side was worthy of admiration?
Bonus Questions: If the Kim family dynasty ever falls and North Korea joins South Korea as a single, democratic Korean nation, should the statues and poster images of the Kim family stay up all over the North to remember history? Should North Koreans be entitled to an environment that doesn't offer ubiquitous reminders of the monsters who tyrannized their nation?