There's never been a true war that wasn't fought between two sets of people who were certain they were in the right. The really dangerous people believe that they are doing whatever they are doing solely and only because it is without question the right thing to do. And that is what makes them dangerous.
-- Neil Gaiman, American Gods
This reminds me yet again of the dangers of dogma and the contradictions of deity. The good that Man will do in the name of something larger than himself is eclipsed only by the evil he will do in the same name.