Ok, during the time of us giving support to Osama Bin laden, it was the time of the cold war. And in the cold war, the US hated the USSR. And the USSR was invading afghanistan. So, of course we were going to support Osama bin Laden - we both had common enemies.
As for saddam, and his people to over through him and it not being our job - those people under Saddams rule couldnt think for themselves, and sure as hell didn't have enough guts to overrule him.
But they DID have WMDs. They DID give us a few before they invaded. and if we backed off right then, they then would of reproduced them.
Perhaps you're not familiar that the Iraqis wouldnt let some of the UN weapon inspectors in certain buildings. So, heck no, Iraq by no means was a highly inspected country.
Where do you live Lovechild? Most european countries can easily get Nuclear weapons by the backing of NATO.