heard that figure for years. looking at actual numbers for the German Army casualties during WWII. Total Casualties (KIA,MIA,WIA,POW): 4,188,000. Casualties on the Eastern Front: 3,498,000. Casualties on all other fronts: 690,000. Even if not 9 out of 10, pretty clear that the Russkies did a majority of German killing during the war.
No they didn’t. Factor all the Germans, combatants and non-combatants killed by the 8th. Air Force and the RAF. The Russkies didn’t have a strategic bomber force.