Don't stay so narrowly focused on the Nazis. That's a trap to distract you from the greater scheme. The evil you speak of is far, far older and larger than Nazis and the bloody play of WW2. This greater evil entity held global sway, not limited to Germany and Europe but also over the Americas and Russia, long before WW2 even started. Both Axis and Allied sides were manipulated by this singular entity, with the Axis "loss" being little more than a kayfabe cover story to provide a sop of false closure for the suffering masses. The Nazis didn't "go into hiding", they just went through internal corporate restructuring, where the vital personnel and assets who really ran the German side of the war were smoothly transferred to their counterpart American and Soviet departments, and everything else quickly liquidated and disposed of. War, death, and suffering is the business of this ancient global evil that has no loyalty to flag, people, or nation, and it conducts its business very, very efficiently.