No, pretty much every intelligence agency in the world thought Saddam had WMD. I think he did and he moved them, likely to Syria with the Russians help, specifically following a large earthquake where Saddam hid his true intentions by the appearance of truck convoys of "flood aid" to Syria in 2002, actually weaponry. Why that is such an improbably thing to some I will never understand. All Saddam had to do was cooperate with the international inspectors and he refused. He knew the jig was up in his heart, but hoped America would knuckle under as they had before. Heck we politely left him in power in the first Gulf War, obviously surprising to him, emboldening him to be more brash.
We have never taken anyone's oil Libya or Iraq. We haven't "expropriated" anyone's oil. American ingenuity preserved Kuwait's oil after the hundreds of fires set by Saddam. We preserved it for THEIR use. We didn't take it.
And yes, 30 years of previous administration's (beginning primarily with Carter and continuing through Clinton) failure to deal with the rattlesnake nest IS why 911 happened. The evil ones understand only power, and we exhibited weakness when flaunted.
We had nothing to fear from Saddam using WMD against us BUT, with the spectre of him giving a biological weapon or dirty bomb material to an eager terrorist group WAS most certainly a reasonable fear.
The flow of oil has been the reason for unstable world events since oil was first discovered. Ensuring the free flow of the world's lifeline most certainly prevents other motivations for war, like starvation and self preservation of folks that don't have much oil and depend on the world's supply.
There was no sinister motivation for Iraq other than a President was sworn to protect his citizenry the best way he could while face with unprecedented and totally discombulated means. We had never faced such an ominous and uncontrollable or unrespondable situation like radical Islam had presented. Especially with our open society and borders.
We do live in a global economy and society, and when there are trouble makers, the powerful good guys, (us by the way) are depended on by the rest of the world, whether right or wrong. I don't want us to be the world's policeman, but we do bear responsibility for keeping the world from descending into chaos, I believe. Just like we did in WWII. The only difference was that the people we were fighting fought under a flag with particular uniforms on. Our parents saved the world. They could have taken the selfish route and thumbed their noses, but they didn't. Our country did the right thing. As they most times do, and I am thankful for that.
We are doing and have done the right thing concerning the war on terror. I salute Obama for at least continuing the drone attacks on the terrorist and especially for taking out Bin Laden. He has also apparently seen the light on the Gitmo thing and dropped his demand to close it. We are at war and will remain at war for at least a couple of decades, I believe.