I did not read through all your cites. Just for the record, there is one more instance of "credible evidence" of collaboration, that speaks for itself, nobody has mentioned in this thread yet.
Lest we forget... Ramzi Yousef is considered to be an Iraqi agent. He also participated in the first Trade Center Bombing and in Project Bojinka (Sp?), a foiled plot which was to have destroyed 12 large airliners over the Pacific at the same time. He is the nephew of Khalid Sheik Mohammed, the 9/11 Mastermind, who is al Qaida.
Thus, we have a link between Iraq and al Qaida, World Trade Center Bombings I and II, bombs and airplanes and a whole lot of other stuff in these two guys.
That's why the phrase "the arm that is already hurting" is so appropriate. Sadaam hurt it.
Res ipsa Loquitur? (The thing speaks for itself)
The book The New Jackals dealt with Ramzi Yousef and OBL.
It was one of the best books I've read on terrorism and the FBI said Yousef was the most experienced bomb maker they have ever dealt with.