Exactly, I used to think same about USA until I came here.The world hates America but when the big Tsunami like in  Japan, or Earthquake in Haiti happen who they expect from definetly USA. USA big country, big economy and definetly spend big money for third world countries. Its the media who is trying to ruin the image of USA.Just take example of Libya when gaddafi is killing  his people the world, most countries want U.S to sent it troops and  and do some kind of attack against him.
I have seen lots of american people and they want USA not to interfere foreign country and not to help them big dollars either in big natural disaster.