Why is this argument that simply reduces religious violence to what people read in ancient texts so compelling? It's certainly not one that's emphasized by the same folks when discussing the relationship between hyper-violent video games, television and movies, gangsta rap and death metal, etc to gun violence.
What exactly is the risk of exploring the complex history and contemporary political landscapes of the mideast to account for the rise of Islamist militancy? Why do the same people who thunderously assert the interconnectedness of global markets and geopolitics just as vehemently argue for a hermetically sealed, "endogenous" growth of political Islam? Who benefits from a narrative that suggests that colonial domination followed by cold war skullduggery and realpolitik, clientelism, unconditional support for a apartheid-state, invasion and occupation, etc. is really just a less important "bum roll of arthe dice"?
The answer unfortunately is quite simple: those who have been and continue to be served by the status quo and don't want anything to change. The fact that the cries of "caliphate!", etc. here have only grown more shrill since uprisings adopting the language of secular democracy, jobs, and rights have taken root there suggest that the arguments have nothing whatever to do with "getting to the bottom" of what makes suicide bombers tick and even less about upholding our values.
At this point in time, in the context of what's happened in the last month when Muslims are rejecting political oppression and speaking to material issues like jobs, Sam Harris' arguments simply look like outdated apologies more suited to 2002 than now. It's time to re-evaluate our historical role vis a vis the "Muslim world" and try our damnedest not to repeat the same mistakes. Resurrecting a discredited "clash of civiliztions" narrative from the neocon era and condemning all of Islam as a "cult of death" is a guaranteed non-starter with those moderate Muslims and secularists trying to make a break with the past.