At the beginning of The End of Faith Harris describes a hypothetical suicide bomber and talks about how "easy" it is to guess his religion even if you don't know anything else about him. It is made explicit that he is talking about Islam. At the time the book was published, if you randomly selected any person who had successfully carried out a suicide bombing, they would be far more likely to be Hindu than Muslim, as it was the Sri Lankan Tamil LTTE who pioneered the tactic and were its primary users.