Harris points that most of the barbaric violence being orchestrated by Islamic extremists comes from the directives written in the Quran itself, essentially making barbarism a socially sanctioned behavior and duly supported.
The problem with this is that anyone lightly educated about and familiar with Quranic verse knows that it does not do this at all. The radical ideology formed by terrorist groups is not from the Quran anymore than the teachings of the Carholic Church are from the bible. The origin of such practice and belief is solely the leading individual, not the Quran. As has been pointed out by some who have been held captive by Isis and freed, ISIS soldiers and captors don't even possess a Quran.
I do have the book, and can provide countless verses against all violence except in defense - defense which is also regulated by stating emphatically that being unnecessarily violent, up to and including taking a life, will yield condemnation from God.