I don't see why the U.S. would have bombed Britain, France or Poland.
My point is that it would have been possible for Germany to win the war in western Europe with
QUICK campaigns. But once they (or he?) declared war on the Soviet Union and the United States in the same year, I really don't see how they could have won the war. (of course at that time they were not fully aware of what we know today, including the nuclear weapon).