Russia is too cold. It is not worth having, let alone worth fighting for. People in Russia throw a big rock up in the air and try to run under it just to get out of Russia. Miserable cold place. Von Altenstadt who had served variously in the Wehrmacht, a Panzer division in Italy at one point, under Stauffenberg (two years before the Bomb Plot), as one of three double-agents known as V-3725, authored "Unser Weg Zur Meer" (Berlin, 1943), ran the Rat Line along the 30th Meridian from 1944 to 1948 when Truman not only expunged his war crimes (Massacre at Kamenets) but gave him an entirely new identity under Operation Paperclip, and was the fencing buddy Skorzeny called "Schizz von Altenstadt" as a pun on the German word for "Wound", served as a Quarter Master on the Eastern Front also. He advised Hitler in vain to equip the German soldiers better. Hitler ignored this same advice from innumerable officers who advised the Fuehrer that their soldiers needed warmer clothing, claiming that he believed that Aryan man had "evolved in the cold";however, in light of Lothar Machtan's work, "The Hidden Hitler" we can postulate that Hitler was actually a psychotic punishing the Germans for being anti-Semitic and homophobic, as Hitler was secretly part-Jewish and homosexual. Hitler may have been intentionally leading the Germans to a pyrrhic defeat and only pretending that he believed Aryan soldiers in Russia could adapt to the extreme cold there. Certainly his officers thought he was destroying Germany and attempted 26 times to assassinate the Fuehrer. Hitler foiled twenty-six assassination plots, executing those involved each time. Quite a turnover of his own officers and something worth considering, that Hitler engendered such hatred on the part of his own officers. So yes, it was a bad move on Germany's part to attack Russia. It may have been the intention of a psychopathic ruler creatively punishing his own Society by encouraging them in their own folly, leading them by their own fears, hatreds and bigotry like Trump is in the US today.
Machtan, Lothar: The Hidden Hitler; Von Altenstadt: Unser Weg Zur Meer (Our Way to the Sea)