Actually they believe that there was enough communist in the country that they could convince them to join them in eventually. Of course this news so on maybe interesting as to how it came about. Even prompting or encouraging the invasion in some aspect of things.
Then the main them was to kill any uprising once they had a grip so on and then export Jewish people to have them killed or open up plants there to have them killed.
This is a bit complicated in ways is all ok as far as what exactly happened is all.