A truly fascinating article by a former member of the British Jihad Network. The author elaborates on why it is that Muslims join terrorist groups and why they attack.
While I count myself a libertarian in political outlook, I generally run more 'interventionist' than most libertarians. Regarding the current war on Islamic terrorism, I have found myself often in sharp disagreement with many libertarians over the causes of the conflict. Most libertarians argue that the primary cause is American foreign policy, indeed many go so far as to blame American foreign policy for 9/11 and other attacks. I disagree. While I am very critical of American foreign policy on many fronts, I do not believe that is the primary cause of Islamic hatred of the West. The cause, I believe, of this hatred and thus the conflict is the radical Islamic view of the West as decadent, materialistic, and secular. I think this article bears this out.
I also direct you to David Kelley's "The Assault on Civilization" for a more elaborate explanation of Islamic hatred of the West.