Balljoint
Senior Airman
There were a lot whose asses were in as deep into these human rights atrocities as Hitler's was, Balljoint. I could be being naive but it just stands to reason to me that there were a lot more than just Hitler who knew it was too late for them to turn back. That I'd think hindered the efforts of these conspirators probably the most.
Nazis and SS had a lot to answer for. But still most walked even after Germany was unconditionally defeated. Query; would they have done even better if they would have negotiated, for instance, a withdrawal to Germany's after Hitler's demise? After all, it had happened under Hitler's orders. And the Crimes Against Humanity theory was a bit ex post facto and in the future.
There's some evidence that Himmler was losing faith in the cause. An English bishop was approached by Germans during May, 1942 in Stockholm with assurances of increasing doubts about Hitler. A plot involving the overthrow of Hitler by the SS and, in turn, the overthrow of the SS by the army was reported. The Brits didn't bite because of concern about the Nazis keeping power and loot. However, Stalin was both bleeding and feeling abandoned during this period. If he could be turned in a separate peace, the sans-Hitler German "reform" government would be in a strong bargaining position for, say, withdrawal to old borders and inspected reforms. On balance, this would have saved lives both on the battlefield and in the death camps. And maybe round three in another twenty years.
I'm not advocating this. But the pieces were in place so that it could have played out so had Hitler been taken out.