There's the problem -- conflating Fascism and National Socialism.  The one has little to do with the other, beyond the focus of both on state control.  Both were actually praised at the time by the Left.  And note that Einzig's book came out in 1933!!!

 

As to Progressivism, there is nothing liberal about that philosophy -- it was born of intolerance.  Eugenics policies, immigration restrictions, the need to prevent "race suicide," were Progressive notions.  The writings of Edward Ross, Richard Ely, et al. display gross intolerance, and advocate policies, political and economic, consistent with what would become known decades later as Fascism.

 

Charles McCann