Ironically, when Hitler came to power, he saw England and Poland both as potential allies.
He greatly admired, the then-Polish leader, Marshal Pilsudski, because he knew how anti-Russian he was, and that he was prepared to allow Poland some of the spoils, if they joined the Nazis against the Soviets, of course returning Danzig and The Corridor to the Reich, would have been part of the deal, but Poland stood to gain areas of the Ukraine.
And as for England, Hitler knew they had no love for the Bolsheviks, so he figured it would be a slam dunk, especially if he had no claims on the British Empire.
Hitler just couldn’t conceive why both refused to ally with him, and he never forgave them for it.