Arab terrorists blow up things and themselves, it is their modus operandi.

If you were going to frame arabs, you would not create a fiasco of plane crashing when your intention was to blow the building up like arabs would have done it.

Would the act of plane crashing not be enough to show how despicable arabs are and use this 'excuse' to attack the middle east?

How do you get 100's of men working to plant tonnes of explosives in multiple buildings without being detected? Chance of detection, the plot foiled, hang the modern day Guy Fawkes, would make this an idiotic idea when the genius had already had the planes idea in the bag and ready to unleash its effects and consequences.

As soon as someone blows their nose there is a conspiracy about it, as far too many people have far too much time on their hands to make things up. Long live Omar Khayyam and tales of conspiracy nights!