Wow so according to your propaganda jpeg, the Soviets were helping to murder Germans, and Hitler allied with them against Poland? That makes no sense. And they were all NKVD, so Poland was already part of the USSR? Uh huh.

Let's look at Hitler's Poland invasion speech. While complaining about the treatment of Germans abroad he states

"I must here state something definitely; German has kept these obligations; the minorities who live in Germany are not persecuted."

How can you live with so much irony as that? Nazi's compared Jews to rats and Africans to monkeys. With that attitude how can you be mad that Jews compare us "goys" to animals? Moreover, Jews had already been marginalized in the economy and banned from professional jobs. So the treatment of minorities argument is hilarious.

"When statesmen in the West declare that this affects their interests, I can only regret such a declaration. It cannot for a moment make me hesitate to fulfill my duty. "

Translation: I know this will start a world war, but I cannot for a moment be smarter than that.

https://fcit.usf.edu/HOLOCAUST/RESOURCE/DOCUMENT/HITLER1.HTM

No mention in that speech about Soviets and Poles teaming up to kill 56,000 (!!!!!) Germans or anything close to that. In fact his tone on the USSR is reconciliatory. They have no beef and will never fight again according to his speech.