Amazing bit of revisionist history, all in all.
What happened in Iran? Oh, yeh, the CIA toppled the Mossadegh government in 1953, installed the Shah, poured in support for 20 years, until the people threw him out. His secret police were so effective that the only organized forces left were the Mullahs, and the Tudeh, the Iranian communists, who were immediately massacred by the Mullahs... but that was obviously Carter's fault...
Lebanon? The jewel of the middle east was purposely destabilized by our client state, Israel, with a huge influx of palestinian refugees, partial occupation, and lots of guns and money provided to the phalangists... Reagan was dumb enough and arrogant enough to stick Marines in the middle of it, who began immediate cooperation with the phalangists and the Israelis... Muslim terrorists employed a completely unexpected strategy to kill hundreds, forcing a serious re-evaluation of WTF we were doing there, anyway...
Afghanistan? Even after the Iranian debacle, we used the forces of radical islam against the soviets, supplying money, guns, radical texts, intelligence and encouragement for Saudi sponsored madrasses to "educate" rabid islamic cannon-fodder... after the soviets withdrew, we dumped 'em, left them to their shattered country with a bunch of thugs we created, thinking that they couldn't get to us...
Al quaeda? the ongoing and unnecessary presence of American troops in the KSA after GW1 gave them the excuse they needed for more recruitment, and for action... their CIA provided connections in Afghanistan gave them a base...
Iraq? Hey, there's that famous shot of Rummy and Saddam, and all the undercover support for their war with the Iranian mullahs... not to mention the miscue wrt the invasion of Kuwait, or our failure to tell our friends there to find a better way to deal with the 800lb gorilla next door... that putting his nuts in a vise over war debts and oil wasn't a smart idea, at all...
Yeh, lots of stuff can be attributed to leading up to 9/11, but it's mostly the result of our own actions and arrogance, a tradition now culminated by the invasion and occupation of Iraq, who had nothing to do directly with that tragedy, anyway...
Now, of course, we're stuck in more repetitions of the same arrogance... we can't pull out of Iraq until it's "stable", and that won't be happening anytime RSN because of the Bush Admin's excrable incompetence in the whole affair- from the false justifications to the failure to provide sufficient force to create order to treating the so-called "reconstruction" as a giant cookie jar for corporate cronyism... and a lot of other cavalier acts of utter disregard for the people we're supposedly there to save from tyranny...
Ultimately, somebody will simply be forced to declare victory and leave, no matter what's really happening, which likely won't be victory, at all...