If my memory of military history is correct, some of his most famous speeches were rehearsed before a "test" audience beforehand, so as to achieve the greatest emotional effect.
He had some brilliant decisions, some terrible decisions (Operation Barbossa), but overall, his massive military successes lay in the technology, efficiency, and leadership of the German army.
You haven't answered the question. And to be more precise, he had six million Jews put to death, excluding another great number of non-Jews.

