TB,
To be fair, he does have a point. But only up to a point. Islamic extremism isn't new, just look at the 1972 Olympics and UBL was around and kicking and on the various radars (albeit as a peripheral, long way off we don't need to worry to much about this guy now character) well before 9/11.
If you look back to Afghanistan when it was the Mujahideen fighting the Russians, there was still a lot of anti-western feeling. Why do you think a lot of the weapons and finances from CIA, SIS and various other govts and agencies went via Pakistan? Both because it wouldn't be great for us to be seen funding the Muj. but also because your average fighter was less than enthusiastic about the decadent west and receiving help from them was a bit galling.
So in some ways, our decadent western infidel lifestyle has always been at odds with the hardline Islamic viewpoint and was always likely to lead to tension between them and the west. Invading 2 Islamic countries in the space of 2 years has hardly helped matters - that I will grant you!