The Old Testament god killed children on a regular basis. But the Old Testament is not the source of Christianity--it's only there to provide context to what is said in the New Testament. It's essentially a different god--Christians don't worship Yahweh, they worship his half-human son.
As for religion, I would be happy if the Christian god existed. But if he does, he'd have to be the Deist "watchmaker god", not the recent concept of a god who intercedes in the world.