Tearing down the statues is a double edged sword.
Remove the monument and people will conveniently forget about the associated errors too.
The monuments should be augmented with historical truth regarding the evil the individuals - and their supporters in the USA and elsewhere, perpetrated.
You are correct about that. But the purpose of those displays was to poke a finger in the eye of folks like you and me. And the left would never tolerate the truth being attached to their icons.