I have just been reading chapter 2 of your book "That first naked glory".
You are a very clever man, Mr Rothery, but you might be too subtle for your own good. By trying to persuade people that incest is ok you are directly challenging God, who told Moses to tell God's people that is is NOT ok. Challenging God is fine so long as you understand that God always wins every disagreement with mankind. God is always right. That's just the way it is.
I have been reading your books. God has read your heart.