A commenter on Daily Kos makes an inflammatory, though compelling case:
Al Qaeda wanted Saddam removed from power, Bush removes Saddam from power. Al Qaeda wanted US military out of the Saudi peninsula, Bush removes US military from Saudi peninsula. Al Qaeda wanted to be treated seriously as a world class player locked in a fundamental clash of nations (for recruiting purposes) as opposed to rogue criminals, Bush declares them world class players locked in a fundamental clash of nations and refuses to view this as a law enforcement action. Al Qaeda wanted a chemical weapons lab at Kirma, the pentagon wanted to destroy it, repeatedly requested to destroy it; Bush refuses to allow it. Al Qaeda wanted the US to restrict freedoms on it’s citizens, the Bush administration restricted freedoms on citizens. Al Qaeda wanted the population to be afraid, Bush tells the population to be afraid.
If you peel it all back you have to admit that by Bush giving Al-Queda it’s prominence – he also gave it it’s power.