Then there's this:
A friend who attended the Medical College of Baghdad University with Dr Abdulla told The Times that he was a religious fanatic, and that in 2001 or 2002 he mysteriously abandoned his studies for a year. “There was some talk that he went outside Iraq to develop his religious culture. I heard that he went to Lebanon or Pakistan,” the friend said.Which would be huge, if true. Why? Because the conventional wisdom is that our invasion of Iraq has inflamed worldwide jihadiness, not our invasion of Afghanistan or even 9/11 itself.
We need more corroboration, of course, but it's interesting nonetheless. Something else to keep in mind--both