I disagree with you entirely because the American foreign policy is the opposite of Hollywood.
You haven't seen the list of the Oscar nominees and winners, or watched any Hollywood political movies in the past months, have you?
If that was the case, America would be sending an ambiguous dual message, W Bush says share Democracy but fails in his plan, Hollywood says isolate and also fail at that.
Then what is the world catching? If they aren't catching one or the other, but both, then they can choose if they agree to isolationism or interventionism, if they are choosing what they pick, America isn't preaching anything at all.
Here's some morality for you:
http://www.bbt.com/about/media/newsr...9%3A48%3A52+AM