From Mark Mazower’s “Hitler’s Empire: How the Nazis Ruled Europe”:
The early 1940s are thus a prime example of how the violence of war—especially when short-sighted and ideologically driven political leadership is combined with overwhelming military superiority—may lead to an almost limitless escalation in the use of force and a constant revision of rules and norms. The Nazis embraced the idea of pre-emptive war and did not regard themselves as generally bound by international law; as a result, only their own ethical constraints (which intense racial nationalism weakened where non-Germans were concerned) set limits to what they regarded themselves as justified in doing. Yet if war allowed the regime to conquer territory, it was also a means—as Hitler himself well understood—to change the Germans and their values.
Totally irrelevant.