This was really interesting to watch. It left out a lot obviously. But, a clear message comes through... When there is a madman on the lose, don't be a member of a communist/socialist mecca that is so wealthy and successful that it sends brigades of men to fight Nazi Germany with broomsticks and farm implements from their own (by own I mean... under-equipped-collective-government-run-starvation producing) farms. .. and then goes begging to war besieged England and the United States for arms.
Stalin is brilliantly played by Michael Caine. And, if you know anything of the history, there is a lot between the lines.