USA - Good Nationalism;RUSSIA - Extreme Nationalism
the Americans aren't not a nation (нация), but the people/folk (народ). Because they do not have their own language, culture and so on.
OP, your list of caricatures of each country in the war has nothing to do with motivations - you just listed a bunch of stereotypes.
I meant that American culture exist, but not in the classic sense. Only modern culture. Well, or tell me folk tale of Americans. In fact, I do not care.
JAPAN - Extreme Imperial Nationalism; Die for the Emperor, Honor, Sacrifice, Expansion, Empire, Strategic Inovations (shallow-water air-water torpedos, etc) and Strategic Assault, Suicidal Defence
GERMANY- Extreme Left-Wing Nationalism