I think as with all religious or spiritual ideas it is not the origianal thought or truth that brings destruction, but mans/womans interpretation (or lack there of), greed and corruptness that brings about horror, destruction violence and hate. Unfortunately even the spriritual leaders on this planet are in fact human, and though they may believe themselves to be superior to the rest of us they are not, and almost all, threw the history of man kind have fallen from grace.
it is not until people are willing to take responsibility for their own connection to "god" that this kind of thing will stop happening. when commen man believes with out a doubt that he has the ear of his god and that he has no more to do than to live as well as he can, when man is willing to face his own consequence and stop asking why, that will be the end of all holy wars.
IMHO