I think all of us are off mark in many areas. I grew up with WWI (or rather Great Patriotic War) history around me: most families had someone fighting in that war. My mother in law, for example, grew up in a small town that was taken over by Germans and Russians several times. Her sister was shot by the German soldiers. For that reason I have an unhealthy interest in that period of history.
WWII was the Great Patriotic War, brah. I assume you made a typo? But I don't follow you re: "off the mark"...about what?
If you are game check out the book by Victor Suvorov, Icebreaker. Who Started the Secong World War. He proposes another theory in regards to the history of German-Soviet war. He puts together a lot of circumstantial evidence for Stalin having planned the invasion of Europe in 1941 and that Hitler's assault was a desperate attempt at preventive strike. Even leaving this aside the stats in the book are often surprising.
I have read Suvorov, and frankly, it's quite likely that at some point Hitler realized that Stalin was using the Molotov–Ribbentrop Pact to prepare for a war with Germany. Hitler understood what was coming and simply pulled the trigger first.
With two emerging, belligerent, totalitarian powers next door to each other it was nigh inevitable. Unfortunately, history of the Second World War is so unbearably polluted with agendas that it's hard to know what really happened other than that a tremendous number of people suffered and died, and that the world was no better off at the end of it.