Here is a CATO article by Julian Sanchez on the al-Awlaki killing which we have already beaten to death. I link to it here because it has a very perceptive discussion on the issue of blowback.
First, over the last decade we have been repeatedly told by foreign policy hawks that it is foolish, and even borderline offensive, to suggest that aggressive U.S. action abroad may have the counterproductive and unintended consequence of swelling the ranks of terror groups. When evaluating the wisdom of drone strikes or invasions of other countries, we need not even factor in the downside risk of “blowback” stemming from such actions, because “they hate us for our freedoms.” In other words, radical Islamist terrorists are fundamentally motivated by a vision of a global caliphate, not by any grievances stemming from real or perceived injuries inflicted by U.S. policy. I think of this as the “No Marginal Terrorist” Theory, because it posits that people are motivated to join terror groups strictly for reasons connected with either personal psychology or theology, such that reactions to specific U.S. actions never make the difference at the margin.
At the same time—and often by the same people—we are told that Anwar al-Awlaki posed a grave threat to the United States, not so much because of any particular logistical genius he possessed, but because he was so dangerously effective as a recruiter and propagandist who could inspire people already living in the West to jihad. Surely, then, it’s relevant to inquire into the nature of this lethally effective propaganda. Here is an excerpt from what The Guardian calls one of ”his most direct, English-language statements endorsing terror attacks on Americans”:
With the American invasion of Iraq and continued U.S. aggression against Muslims, I could not reconcile between living in the U.S. and being a Muslim, and I eventually came to the conclusion that jihad against America is binding upon myself just as it is binding on every other Muslim….
To the Muslims in America, I have this to say: How can your conscience allow you to live in peaceful coexistence with a nation that is responsible for the tyranny and crimes committed against your own brothers and sisters?
Possibly al-Awlaki is just a sort of Salafist James Earl Jones, and the sheer hypnotic beauty of his voice is what compels people to sacrifice their lives for him, without regard to the specific contents of his sermons. Still, it seems to be a problem for the No Marginal Terrorist Theory if a propagandist who was believed to be uniquely effective at motivating people to become terrorists used rhetoric like this to do it.
The “No Marginal Terrorist Theory.” I like that. I would just add that the interventionist hysterics do not just suggest that discussing blowback is “borderline offensive.” Many suggest it is evidence of America hating at best and treason (a capital offense) at worst.