Why? Sit around and wait for threadbare Saddam/sorta AQ conspiracy theorists to get their act together, while Iran hosts the IRGC, the Special Forces of Islamic Terror, as well as Hizbullah? Or while Pakistan, which is a nuclear power, has ISI ties to every terrorist group in it's borders (including people who have flown planes into our buildings). The guy behind the Bali bombings served a whopping 2 years in prison because of the Indonesian government, and you're worried about what if scenarios from Iraq?
The Iraq/sorta AQ links are ridiculous in light of the actual government/Islamic terrorism links in our world.
So we can't examine all those issues?
Can't walk and chew gum at the same time?
We should ignore history?