I already explained in other comments. I pointed out the contradictions of the story you're telling.

What you're alleging in the jpeg is "Hitler teamed up with the Soviets who were killing them to defeat the same Soviets in Danzig". That's illogical, and even if true, as I mentioned in this comment thread, it's immoral and dishonest for Hitler to say "I no longer see any reason why we should still oppose one another" if they were genociding Germans.