My thoughts on why Bush
 

The results of these 2004 Presidential elections show me that the average population of the US is still unconscious.

The big problem is religion. People are endoctrinated, and their mind becomes prisonner of Dogmas.
The worst is that people are slaves of their mind instead of being themselves.
If the majority of people were true to themselves, honest and respectful of themselves and others, then they would elect a leader who knows truth. The result of the election is a reflection of this countryes state of mind... an attempt at preserving the old values that do not have their place in the 21st century anymore.

I am optimistic, as right now, human beings are waking up, and events are taking place that cannot be undone. The old generations are dying and new generations are taking over.