Excuse me while I heat up the popcorn before diving into the comment section
The only chance he had, while still taking Poland, was to not meaningfully attack France, Netherlands, or Britain. Make it clear he was willing to settle with them. None of those countries were thrilled to be in a war, that would have been the end of it with a new map of Europe.
The West didn’t care about the Holocaust and felt more threatened by Russia. The war in the Pacific would have still happened of course. And there’s a fair chance the West would have teamed up with Hitler to fight Russia.
Anything beyond Poland was just a bridge too far.
They didn’t have that many nukes at the time. Plus people would be upset if they nuked a white people country
The manhattan project originally start as a way to defeat Germany, it just wasn’t ready in time.
The plan was the bomb Germany with it first, Japan only got the bombs because we weren’t going to not use them once we had them.