Look, America has two faces, one is the American people who we all like, we can drink, fight alongside with, shag and generally have a good time with, the other side is the United States of America, the official side, the one the world either hates or is scared of, the side that interferes in other countries affairs, that supports tryrannies because they 'oppose' the commies. We know the difference and we know which side is our friends.
The USA, the official side started losing world credibility with the McCarthy witchhunts then Vietnam. Supporting the Shah of Iran and his ilk around the world, arming the Taliban, selling weapons to Iraq, invading Grenada helped drag the USA's reputation down even more. The first Iraq war, then the second and finally Afghanistan has exhausted much of the good will that was left. However Americans have never been regarded the same way as their governments, although that may sound odd but they haven't. More than any other country we seem to disassociate Americans from their leaders.