"If you know your history" @davek....Russia won WWII and kicked the Nazis into touch. What a way to thank them.
Finland posed absolutely no threat to Russia mate, and they had already watched the Russian army march into Poland and apply the coup de grace after the Nazis had invaded from the west. Then Stalin issued demands for an absurdly large chunk of Finnish territory for no apparent reason and when the Finns said no, he marched in and tried to take it by force.
Finland at this time was a neutral country, and Hitler and Stalin had signed their non-aggression pact. I don't think it's unduly harsh to criticise Stalin on this point.