Because people are selfish and not open-minded. Unstead of trying to do things to get more knowledgable, such as doing research, contacting politicians, etc, they just listen to what the media says or what someone else's opinions are, and then they make their opinions the same. Also, when things don't go people's ways, or when usual things are disrrupted, they blame the President. Case in point, the gas prices. Bush doesn't control if the prices go up or down, but as stated above, people base things on what they hear or read, instead of making their own opinion.