Well there is AQ the organization, which I believe was primarily invigorated by the Saudi's rejecting Bin Laden's offer to protect them from Iraq in favor of allowing the US to come in with a large military presence to defend Saudi Arabia and Liberate Kuwait,

Then there is the broad base of support to AQ from popualces across Muslim dominated countries, primarily in country's that have been heavily manipulated and controlled at the governance level by the West; or have heavily relied on the West to stay in power often rather manipulating it rather than being manipulated themselves.