The thought is: You are an US-American and the USA had been an ally of Stalin - what had and has chaotic consequences also for the USA.
I have written much saying just the opposite. Were you not paying attention? Also, "if" there was an agreement between Germany and Russia to take Poland,
There is no "if". Hitler and Stalin agreed in the Molotow-Ribbentrop-Pact to eliminate Poland again. Basing on this agreement Hitler made an orchestration which made it for the German public plausible that the Polish had attacked Germany. This inscenation ended with the famous sentence "Seit 5:45 Uhr wird jetzt zurückgeschossen" =
"Since 5:45 a.m. they are now firing back". This was the birth of world war 2 - but not the pregnancy of world war 2.
you would think that they would have coordinated their plan and attack at the same time.
As far as I know Stalin attacked Poland a short time after Hitler. They said they like to help Poland - their Slawic brothers.
If there was such a plan, Hitler certainly got played for a fool.
I fear "godless fool" and Hitler are nearly the same word. The question is whether 'Stalin' had not been a much better Russian translation for "godless fool".
Because when Germany did invade, Russia didn't. Leaving all the blame on them. And a declaration of war by countries supporting Poland. Now if Germany and Russia would have attacked at the same time, allies of Poland couldn't very well declare war on just Germany.
We often say "Denken ist Glückssache" = "thinking is a matter of luck". You are not very lucky now. For the USA with a titanic unemployment of the people it gave millions of inner reasons to go into a war. And it was for your nation for sure much more easy to try to wipe out all Germans than to try to wipe out Russia.
But when Russia did invade about two weeks later, it wasn't to late to declare war on them also. But it didn't happen. Neither did it when Russia invaded Finland about a couple weeks after invading Poland.
So in case your leading idiots did really not know what was going on - what I doubt about - why decided your nation to be an enemy of Finland?
After that, the countries that did declare war on Germany
China, Polen, Großbritannien, Frankreich, Australien, Indien, Neuseeland, Südafrikanische Union, Kanada, Sowjetunion, Norwegen, Belgien, Luxemburg, Niederlande, Griechenland, Jugoslawien, Tuwinische Volksrepublik, Vereinigte Staaten, Philippinen, Costa Rica, Guatemala, Kuba, Panama, Tschechoslowakei, Dominikanische Republik, El Salvador, Haiti, Honduras, Nicaragua, Mexiko, Brasilien, Äthiopien, Irak, Bolivien, Iran, Kolumbien, Liberia, Ecuador, Paraguay, Peru, Chile, Venezuela, Uruguay, Türkei, Ägypten, Syrien, Libanon, Argentinien, Mongolei
should have sought an armistice.
¿sought an armistice? ... eine Waffenstillstand verlangen?
Sometimes I have the feeling all US-Americans are idiots. This is one of this moments. If I find a picture of Düren after world war 2 then I will send it. The winners of world war 2 had been only sad that not complete Germany had been a desert of rubble like Düren.
Here is a picture:
Oh - I found even a little film from the tourists of the USA in Düren in 1945: