that Stalin did sought, or was even preparing the USSR for a war against Germany.
Stalin was preparing USSR for a war against the West.It was unknown if Germany or another country would attack.The preparation started in 1928 after all the communist parties in Europe had been defeated or their memebers imprisoned.Stalin told the central communist party commitee that SU has to prepare for a war which will take place in the next 10 years,so it has to overcome the gap separating it from western countries in weapons and industry development.
In fact the Soviets tried to convince Germans to go to war against Poland since 1920's.
Very wrong.Stalin did not want a common border with Germany in any case.The Nazis would build roads and railways and be able to attack soviet Union the time they had completed their preparations.
His efforts to increase industrial output and create a meaningful military strength, IMO, is not a good indicator of any specific wars, targets, or perceived aggressors. For a country such as the USSR it was simply prudent to work towards having a strong military.
Not exactly.Lenin and Trotsky had chosen the non-military,politically centered interference in international affairs.Soviet Union during Stalin rule was isolated internationally and all its supporters had been defeated.(in Germany in 1922,in GB in 1928,in Hungary in 1923,in Spain in 1938 etc),so Stalin chose to strenghthen military instead of growing political influence,sure that Soviet Union was the next to be attacked.
That was also in 1941 after the German attack, and almost two years after partisan forces well already pretty well organized in other parts of Nazi occupied Europe.
Stalin could not have taken such decision when officially the Molotov-Ribbentrop pact was valid.It would provoke Germany and maybe make GB sign pact with Hitler allowing him to attack Soviet Union.
The partizan forces before communist parties interventions were very weakly organized and penetrated by Gestapo in most cases.They were not a real rival for Germans.
Partizan forces under communist rule were very dangerous and managed to hold a major part of occupied lands under their command for example in Yugoslavia,Greece,Ukraine.