
He got us out of the worst economic disaster in US history, helped end the worst war in history, created millions of jobs, created tons of social programs and safety nets, beautified America by building tons of national parks and public infrastructure, established social security, etc. Not to mention he’s literally the longest serving president in US history. JFK certainly has a presidential legacy as well, but he doesn’t hold a candle to FDR.
My point isn't that FDR is imperfect, its that leading the country in WW2 and experiencing economic growth because of it pales in comparison to not unjustly imprisoning entire minority groups on a moral scale. Even further than that, we can attribute his "better" policy decisions to systemic issues in the nation today.
Imo, that alone is a greater moral good for this country than anything throughout FDR's terms. I'd feel safe saying about a lot of presidents that they'd go to war against the Nazis if the Nazis threatened America with war. I don't think I could say for many others, if any, besides JFK that they actually challenged the American political system on behalf of their constituents.