There is a contingent of people who think they were brilliant people who nearly conquered the world against impossible odds because of how powerful they were. That only if a few decisions get made different/Hitler is a little different/someone else takes over in a coup/etc that everything would work out great. That National Socialism was really a great ideology to run a country on if only you got rid of the killing and softened up the leadership a bit.
This is all nonsense of course. The leadership of the Nazi's was not just sadistic, but flat out incompetent as well. And their government policy was a total disaster, including their economic policy.
Essentially what happened is they beat two vastly inferior enemies (Poland, Russia in 1941 with no officer corp and the complete element of surprise). They beat one decent (but with its own problems) opponent in France in 1940 mainly because France choose the absolute worst strategy to go up against the German strategy that was chosen. It looks impressive because of how long WWI took, but WWI took place using WWI technology. If the German army of 1914 had WWII era technology they would have steamrolled the French too. In fact that group was way better then the Nazi's it was just the wrong era.
This combined with the myth that the Nazi's saved Germany from the depression builds up the idea of these powerful people that just went a little wrong. And while I will assume a great deal of competence to the German soldiers on the ground the top levels of Nazi leadership were a joke.