Jesus is saying, “you say you are children of Abraham but you do not act like children of Abraham. Jesus is saying, “do you know how Abraham lived? Because he was a man who pursued God. By faith, he walked in obedience to God. You are doing the very opposite of Abraham. Not only are you not walking by faith but you are wanting to kill the one who God has sent to you.” I think sometimes people today can so the same with Jesus as the Jews were doing with Abraham. The Jews thought simply because they were descendants of Abraham and claimed him as their father they were good. And people today simply claim to know Jesus and therefore think they are good. People today can claim to follow Jesus and yet live a life very different than Jesus. People today can think that as long as they believe that Jesus is God they are good and yet Jesus did not simply ask us to believe in his existence as God but to make Him Lord of our lives. To surrender to him. Believing in the reality of Jesus and surrendering your life to Jesus are two very different things. We know this because even the demons believe Jesus is God. Jesus was often describing what a true disciple of his looked like because he understood that many people were following him on the surface. But they had not surrendered their life to Him.