Most statues are not nuanced. The other reasons for the war don’t really come into play in a non-nuanced world, it’s the main one that rings loudest: slavery, and we can’t glorify that.
Maybe the world needs to be more nuanced. Maybe the other reasons for the war need to be better understood.
Build a memorial if you want. But the statues as they exist are misguided.
Which statues? What about the ones for the pows I mentioned and the battlefield markers?