Matthew 5:21 “You have heard that it was said to those of old, ‘You shall not murder, and whoever murders will be in danger of the judgment. 22“But I say to you that whoever is angry with his brother without a cause shall be in danger of the judgment."
First off, the religious leaders often quoted others. "Heard it said" Jesus says. But for the facts, Jesus goes to and is the source. He spoke with authority. You may feel good about your self righteousness in that you have never physically murdered somebody, good for you, however, if you ever hade anger or hatred for another, you murdered them in your heart. Anybody that has a pulse, has murdered in their lifetime. Some are seriel killers. We need Jesus! Oh, by the way, Jesus is not only the Judge, He can be your defense attorney. He never loses any who come to Him in humility. Murder starts in the heart.