Because going full fash is at odds with american history ala WWII the last war where america looked good because they were beating the nazis. That’s why the right has a big interest in making sure everyone knows their political enemies like antifa are the “real” nazis. That and there’s a cognitive dissonance in most burger brains where they know nazis are bad but they still agree with them.
the last where America looked good
I’d argue it’s the only war America looked good in. Civil War - the Union was on the right side but I wouldn’t really count that one.