All belief, regardless of source, is dangerous if unquestioningly given.

[SidneyCarton]

Those who do unspeakable things in the name of Faith, would find other reasons to strap on a bomb belt, shoot unarmed bystanders, or put entire towns to the sword. As human beings, we find it easier to kill for abstract ideas that allow us to dehumanize our enemies. They are infidels, sub-humans, Fascists, Bolsheviks, One-eyed, One-horned Flying Purple People Eaters, etc. To justify this dehumanization we use religion, or we use political ideology, or we use pseudo-scientific arguments, such as eugenics, or some combination of the three. Religion kills. Politics kills. Belief in general, when no thought is put into it, kills.