The Germans...

Tactical experts, poor strategists and logistics is a dirty word.

If you consider that the invasion of such a vast country with a force built for a short war, not Total War, then it was indeed a folly from the start.

I have yet to see a convincing statement that shows Germany could have won in the East without changing the whole German premise for the invasion and the building of German Armed Forces and industry in the late 1930's. To have succeeded would have required differences that the Nazi's and their leader would never have adopted.