( Actually, the subject who was about to die was an Aussie, but the concept was applied to GI's in Japannes hands should a invasion took place.)world, that is a politically-correct fallacy in many, many ways.
There are important distinctions to make, especially within the context of the Second World War, in this regard. The Germans and Japanese, infected with a brand of fascism which was heavily impregnated by racial bigotry and antiquated notions of national greatness. But the Allied side also had it's share of questionable cultural traits, prime amongst them the idea that Empires created by force should last forever see DeGaulle, Halifax, Stalin, et. al.).