Don Firth: 'As long as a particular belief does not condone mayhem...'

Sadly that rules out Christianity, Judaism, Islam, Hinduism... all of 'em quite keen on mayhem in various circumstances.

I think you took me the wrong way when I said that you seem to be making my point for me. I meant that that the loony who charges around with a knife killing for God is not really that much more crazy than someone who has decided to live his life by a set of rules devised by a supernatural being who does not exist. As I said in my first post, the habit of believing in things without evidence is a recipe for trouble.

As for not blaming God for the deranged person - I don't blame God for anything because he isn't real.