What happens when the best American historians name FDR as America's best president, then the American historians are called socialists, leftists etc.
Most industrial nations on the planet have an economic mixture, socialism and capitalism.
Because that is what they are!
Unless you supported FDR invading a country that did not attack the US.
Lying the US in to WWII
Rounding up US citizens and putting them in to camps without any due process.
For building the great military industrial complex.
For creating many socialist programs that were supposed to be temporary.