You're making this about building statues for evil men, while I would humbly suggest it's more about having statues of the men who best represent the ideals of the Cities, towns and villages these statues live in.
Yes FDR horribly mistreated hundreds of thousands of Japanese Americans, but he also lead the country thru WW2 and saved the American capitalist system during the darkest days of the Great Depression.
Tell me, what traits to you see in Stonewall Jackson that would make you want to have a statue of him over looking your town Lion? I mean to me he was a soldier who lost in the only war he fought in. If we're going to be fare, and never mind he was a traitor... no statue for Stonewall just on account of having lost the war.