First off, no....it was not a myth. It was a fact. One that you still haven’t addressed as to what was being transported.
As for your contention that Saddam and Assad were enemies, ever heard of that age old truism (especially among Middle Easterners) that “The enemy of my enemy is my friend”? Saddam knew his ass was toast three months before Bush went in and dealt with him. Saddam was just desperate enough to strike a deal with Assad. EOS
So your deflection calling it a myth is an epic fail. Intelligence agencies know that caravan happened. What they do not know is what was apparently so important to dispose of that was being transported. You have any clue?
Why would I address what was inside a mythical convoy? Maybe it was Christians fleeing Muslims - the Iraqi Christians all went to Syria. And yes, Assad and Saddam were deadly enemies - Syria participated in Desert Storm.
http://www.wired.com/2012/07/syria-iraq-wmd-meme/
No, Syria Doesnât Have Saddamâs Chemical Weapons