A few unconnected trains of thought

I posted earlier about the London bombings. I think that I should post my various threads of thought in case someone can make sense of it.

1. The Madrid and London style attacks are inherently more frightening, yet less dangerous than the 9/11 attacks. The London and Madrid attacks hit at infrastructure that nearly everyone uses and that we all expect to work. In addition, I would anticipate that the truly dangerous attacks would actively use suicide bombers.
2. Western Islam, which tends to be financed by the Saudi government and endorses the Wahabbi sect, is generally more radical than is Islam in other parts of the world. In addition, Islam seems to be picking up adherents among disaffected youth and, unlike in the 1960s, these disaffected youth are receiving a hateful ideology that devalues the lives of others.
3. If al-Qaeda becomes a global insurgency then it will become much more difficult to combat with military actions and will, instead, be fought at home using many of the same methods that police forces used to undermine pro-Soviet groups during the Cold War.

Looking forward to any thoughts on these points