I believe this is an important if rather hurriedly written and criminally edited book that failed to correct some glaring errors like Harris wanting the Catholic Church to excommunicate Hitler who wasn't a Catholic.
But is faith to blame for our brutish, sadistic traits? I think not. Take the Rape of Nanking during WWII. That could be laid on the Bushido Code or to troops blood lust…but not to any faith based ideology.
I think if there was not such thing as religious faith we would have committed just as many atrocities in the manner of lynch mob mentality. The herd is more dangerous than the individual