Somehow I seem not to have gotten across what I had intended. The purpose of the fight by the United States in Europe and the Pacific was the defeat of those forces which had wage a war of aggression against the people of the world. American Servicemen fought to liberate the people of Europe from the rule oof a man and a group of people that surely were some of the most evil people to have ever existed. While the liberation of Germany from the Nazis was not the purpose of the was the death of Hitler and the overthrow of the Nazi regime were. Perhaps I made some poor choices in how I worded things. My goal was not to offend anyone. If I did I apologize.
You didn't cause any offense and nothing you've posted in this thread is out of line.
What I'm critiquing is the basic premise of this TL. The Western Allies were indeed fighting to "defeat of those forces which had wage a war of aggression against the people of the world", as you say. The idea that the Allies considered the Nazis and not Germany itself the enemy is, as I say, anachronistic. That narrative of the war only emerged as Germany rejoined the community of nations decades after the war. If the Allies really thought as you posit here, the Morgenthau plan would never have been floated and the rearmament of West Germany in the Cold War wouldn't have been controversial.
The Allies are not going to suddenly reverse course and stab Russia in the back just because Germany is ruled by a band of thugs in feldgrau instead of a band of thugs in black. Germany is the enemy and Germany must be totally defeated.
Remember that the enormity of the Holocaust has not been discovered yet and Stalin has not been denounced. Even if for some reason the British, US, and Free French governments have a massive collective brain hiccup and decide to do this, the populations of the Western Allied nations are not as hostile to Stalin's Russia as they were just a few years after the war, and they consider Germany, not Hitler or the upper Nazi leadership to be the threat. There is absolutely no way that Germany is going to be allowed any form of conditional surrender. There is absolutely no way the Western Allies are going to take action which is tantamount to a declaration of war against Stalin.
And that's only the tip of the iceberg. How is newly independent Poland suddenly okay with German troops crossing it to fight Russia? How does Germany accept the return of Alsace to France or France leaving Alsace in German hands? Besides the fundamentally impossible nature of the basic premise, you open a can of worms here that can't even begin to be addressed.
If you want a scenario where Germany fights Russia but not the West, have Germany somehow force Britain to make a separate peace after the fall of France, stay out of Africa, and not declare war on the US after Pearl Harbor. It would be a massive stretch to imagine and take a lot of handwaving, but it's not flat-out impossible like what you're trying to do here.