I don't agree that it's religion/religious books that causes wars. It's people using religion/religious books. People can use religion/religious books for peace too.
Putting thoughts to one side, for the time being. Can I ask you who you think is the criminal in a war?
Take the atomic bomb for example, there are lots of people to choose from- the scientists/ the funders ...[text shortened]... ed opinion. I am not Catholic. I find that version of Christianity perverse for a number of reasons.
I don't think you can so easily disassociate religion from the people who practice it. I don't condemn religion per se, and of course a lot of 'good' comes of all religions. I've just returned home to Sulawesi from a week in Bali, where Hindu beliefs and rituals add beauty to the daily lives of people, and those fortunate enough to witness them. My point was that things didn't change very much in a general sense pre and post the Bible, our species will always it seems find something to fight about, it's in our 'nature', if it ain't religion it will be something else.
Where in my ever so humble opinion, which is nothing more that, things start to go awry is when religion dictates to people what they should wear, or how they should think about themselves. The whole idea of 'original sin', which puts people on some endless guilt - trip, or the idea which is propagated by many, and even some here, that children must suffer for the sins of their parents, puts me right off my breakfast.
As for nuclear bombs and whatnot, I can't really unwrap all the ethics of that. (And certainly not before breakfast) I spent a few of my formative years in the 60's and was greatly influenced by the 'Peace Movement', and I suppose I could be said to be a 'pacifist'; all life is sacred, I step over ants on pavements, that kind of thing, but perhaps in war different ethics apply, and it just becomes a matter of numbers; which side has the longest lances, or the best archers, or the most effective bombs. It's tricky, and I don't pretend to have the answer to that one....