Well, now that he probably isn't here, it's time to reply in more earnest. Probably will go on in a couple of posts in the following days.
First back to the previous post, just above >>/50166/
Stalin played Hitler to get into a war with France and Great Britain. Barbarossa was an unseen event by him, it took him by surprise. Suvorov spent time on explaining this too (eg. warning from Churchill, or the sheep price index).
We have to remember in the interwar era there was no CIA to play anyone on Earth, or US based multinational giants to buy the rest. All the major powers had their independent will, which wasn't subordinated to the US master. They had their foreign politics and secret services weaving a web to catch all the others and further the cause of their own country. It wasn't a two sided game of the Cold War.
Communism had quite a few sympathizers all over the world, and recruiting agents for the SU was easy. Stalin was also a devious psychopath who played the Soviet Game of Thrones, and outsmarted all the competing Jews. Furthermore it would be a mistake to confuse the various eras of the Soviet Union, these aren't Andropov times with the lazy corruption and high level of inefficiency.
The Molotov-Ribbentrop Pact not just allowed the SU to act unchecked inside the limits of the agreed border of influence, but it allowed to get into a serious war with France and GB for Germany. One of Moscow's goals was pushing Germany into that mire they expected the war to be. They calculated well the war started. But they did expect what noone expected that Germany will breeze through several countries including France. So that was a failure, they wanted the Germans to bogged down for years in the West as they did in WWI. And failing to recognize they are next are partially for the wishful thinking that the Germans are preparing the landing in Britain.
On the side note they surely observed curiously the Blitz, which had some resemblance to their Deep Operation/Battle doctrine.