I agree with this 100%. I started writing a comment about how the author emphasised all the bad traits of the Nazis-to-be and that’s not really how it worked.

I seem to remember something about how lots of “un-American communists” were pretty staunch anti-Nazis.

But OTOH this was 1941, and there were still plenty of Nazi sympathisers in the US. The battle of ideas was still live then, and I guess Harpers were fighting it.