Been over that, too.
Really, it's like talking to a goldfish. An hour later, you've forgotten the response again.
If there is any significant terrorist who was not one before the Iraq War started, I have yet to hear about him. Look at a list some time. Most of the current crop was blooded in the Soviet invasion of Afghanistan.
The concept of the poor little grocery clerk who suddenly decided to start building car bombs when Iraq was invaded is a myth. The terrorists in Iraq weren't created, they were relocated.
If they weren't in Iraq, they'd be in Afghanistan. Or somewhere else.