It has nothing to do with liking the Taliban. Had Bush only concerned himself with Afghanistan, I'd be one of his biggest supporters.
The problem is that when you rely on propaganda to fight a war you become seduced by your own bullshit and you cannot win a war being seduced by your own bullshit.
It's like writing a novel and then convincing yourself the story actually happened. How can that possibly benefit you to believe in a self-delusion?