And still fewer to think that there was any waiting involved in starving them to death. That was their life in the camps. They were pre-starved, so to speak. The survivors were skin and bones. If they had plenty of time, the gas chambers would have sufficed to finish them off---but the bodies would still have to be disposed of. The Soviets first practiced the art of mass executions and mass graves with the Katyn massacre of 22,000 Polish officers and intelligentsia. You want to say that is a fantasy?

You seem to have this idea that the concentration/death camps were run by brain trusts and not by ordinary mediocre people. In the SS, orders were carried out without question. If they were ordered to bury bodies if there was insufficient capacity or time for cremation, they were buried. Expediently. What else do you suppose they were going to do? Lay down a concrete pad over the graves?

No, there was plenty of evidence available not only to the Nuremberg trials, but also to the trials associated with the death camps. Things like the delivery receipts for the Zyklon B, for instance. You are barking up a nonexistent tree.