God's job in the Bible is to demand things to happen. He does what men want him to do: He's the authority. When the writers of the Bible wrote those stories, they wanted a way to justify their going to war. They would use god as the reason for it.
He is also supposed to be the force, like in any other religious text, that claims what he says is the truth. He claims that he is the one and only true god, just as many other religions do.