I have said that 75 years on, World War Two and its lead up is looking more and more like an internal family fight between the most modern nations in the world.
They were united in believing that there were far too many Jewish undergraduates in university but differed over the solution: while many countries supported the idea of informal hidden quotas, only a few nations felt that all current Jewish students should be expelled and even fewer felt that Jewish undergraduates should be taken out and gassed to death.
Substitute Negroes, homosexuals, defective newborns ,morons in mental homes, Polacks and other immigrants and you get a similar pattern.
But I don't really mean it.
I do not really think WWII was basically a war between nations over just how far to take the logic of Modernity with regards to those judged less worthy of civilized modern life.
Instead, I have found that history reveals that in almost every nation on the planet World War Two generated strong disagreements within its domestic population over how to react to the varing propositions that Hitler,Tojo,Stalin, FDR and Churchill were making as to the reasons for joining their side of the fight.
Many people back then had far more in common with various peoples in many other nations than they did with their own fellow nationals .
WWII created transnational collections of individual consciences (& individual responses) that spanned the globe - from 100% pro-Hitler to 100% anti-Hitler and everything in between.
Today's (and certainly tomorrow's) historians are going to have to start studying the individual responses to the rise of Hitler and let the crude blunt instrument of a nation's overall response to Hitler to languish for a while...