The impression I get from reading Parable of Prodigal Son is that it is more about a father who is prodigal. He gave his son’s share without any sort of reasoning (a kind of lavishness) and on his return made arrangement for a celebration killing “a fattened calf” (again a kind of lavishness) which does not make him resemble like his Heavenly Father who had commanded: “You shall not murder.” (Exodus 20:13) For God, slaughtering an animal or a human being does not make any difference. (Isaiah 66:3) God’s view of lives of other species remains unchanged, declares Jesus: “Are not five sparrows sold for two pennies? Yet not one of them is forgotten by God.” (Luke 12:6) Moreover, God’s view of sin is also totally different from the father of this parable. (Mathew 12:36; 25:41, 46) Thus, this parable conveys a lighter view of sin!
Interestingly, there is another incident in the Bible which similarly carries a lighter view of sin in John 8:1-11 which is now put in brackets by the reference editions of the Bible because it is not found in the earliest Manuscripts of the Bible. Still, JWs believe that every verse of the Bible is inspired of God, and it is their supreme authority.