People believe what they do because they weren't given an alternative. I believed in karma, God etc. until I read The God Delusion- the point is, indoctrination at a young age isn't necessarily the most damaging; it's the neglect to present info when they're old enough to decide

God is not real, ergo the writer of the 10 commandments is us as human beings. They're 'rules' to live by if we're all to get along, we should recognise that it's far more beautiful that we have the capacity to be kind without being forced to be by a higher being.