Want to reduce division in Christianity currently? Is the scriptural old testament the law of Moses; or Genesi

What? Not sure of the point here. Read Romans, start to end. Old covenant and new covenant are described by Paul. He has already revealed the revolutionary aspec of this and it needs no further revelation. The Bible is not only a book of law. It's a way of life. That's the bottom line. Atheist? They totally reject any form of religion as far as I know.