First off all, religion does not cause war. Pride and egomania do. The fact that people can't handle that other people have other beliefs. Sound familiar?
Anyway, I guess I have a unique view on things. I personally don't believe in religion, but I do believe in God. If God truly wanted us to follow a written set of rules, everyone on Earth would be following them. I believe that God's religion is love and compassion, all manliness aside.
However, it can go either way.
No one knows how the Universe started, because it cannot be proven. The Big Bang is theoretically impossible based off of the Law of Conservation of Energy.
Believing some omnipotent being on the other side created the Universe is just as preposterous as believing the Universe was started by whatever it is anyone wants to believe. They are all equally unrealistic and unlikely, however, there has to be some sort of solution. I believe that is God. Many other people will believe otherwise. It's all about one's view on things.
But, we had to have come from somewhere.