How far back would you like to go? If Iraq hadn't invaded Kuwait...
Which the US set in motion by putting Saddam in power AND all but gave approval of the invasion by essentially turning a blind eye to it. If the international community didn't raise such a stink over it, it's quite likely the our boy Saddam would still be at the reins.
And we put Saddam in power because the Iranian people decided that they didn't like being oppressed under the rule of a bloody dictator (the Shah) who was, no surprise, also put into power with the help of the US.
Al Quaeda? We bankrolled their entire operation until we found out that they really didn't like us anymore than the Soviets.
We've been screwing over the Middle East region in one form or another for the past 60 years or so. Is it really any surprise that things are they the way they are given the social, economic, and political unrest that our actions (and others) have caused there?