Germany and Japan are major powers. They each had techinical skills that rivalled our own. The average IQ in Germany is slightly over 100, in Japan about 107. The average IQ in Iraq is in the 80s. If you think that Iraq could ever be the threat to America that Germany and Japan were, you are delusional.
That said, the major reason we have staid all those years in Germany and Japan was connected with the Cold War.
As for Democracy? Germany had a Democracy before Hitler. Indeed, that was how Hitler gained power. He helped found the biggest vote getting Party.
Democracy was never the American goal in 1776, nor in 1787 (with the Constitution). Why don't you read what James Madison, the "Father of the Constitution," had to say about "Democracy." (Or do you think that George Bush is even in the same league as Madison, as an "intellect?")
I suppose that nuclear weapons in the possession of a madman is only a threat to the 'delusional.' If that is the case, I proudly wear the title.
Were you hibernating during September of 2001?