MoH said:
Making out that the invasion of Iraq wasn't a major part of the events leading up to the bombings is unconvincing sophistry

Well you may not be convinced but it certainly isn't sophistry.

I agree with you that it played a part, but, whether it played a major part is speculation ( a speciality of akenanon, but that's another story), secondly I would argue that it merely brought the attack forward in time.

There is plenty of evidence to show that these lunatics will attack anyone who doesn't agree with them anywhere, anytime.