The Japanese needed to obtain oil; it is the main reason the “Strike South” mentality won out over the “Strike North” group.
Germany had endured three winters to force Russia to surrender in 1917; I’ve never mentioned that as a reason for their defeat. Hitler was foolish and evil in his methods, but not crazy.
Not Hitler. The entire German political and military class was stupid to believe they might conquer all of Europe.
There is the reason why the Spanish and not the Germans conquered the World for the European civilization.