Scripture tells us who it is that is a Child of God, any your opinion does not have the authority of God’s Written Word.
(1 John 3:9-10) “No one who has been begotten by God sins; because God’s seed remains inside him, he cannot sin when he has been begotten by God. In this way we distinguish the children of God from the children of the devil: anybody not living a holy life and not loving his brother is no child of God’s.”
One who sins is not a Child of God!
Jesus is God, and his Words are the Commandments that Jesus said we would be judged by, not the Commandments of the Old Law.
Read what Jesus told us. Notice he said those who did not keep his words would be judged by his Word that he spoke. We are not going to be judged by any of the words said by Old Testament Prophet.
(John 12:47-48) “If anyone hears my words and does not keep them faithfully, it is not I who shall condemn him, since I have come not to condemn the world, but to save the world: he who rejects me and refuses my words has his judge already; the word itself that I have spoken will be his judge on the last day.”
The Words Jesus spoke are recorded, any way the one’s he has for us to live, in the New Testament Bible.
Paul told us that we are dead to the Old Law
(Romans 7:4) “That is why you, my brothers, who through the body of Christ are now dead to the Law, can now give yourselves to another husband, to him who rose from the dead to make us productive for God.”
(Matthew 5:17) “Do not imagine that I have come to abolish the Law or the Prophets. I have come not to abolish but to complete them. I tell you solemnly, till heaven and earth disappear, not one dot, not one little stroke, shall disappear from the Law until its purpose is achieved.”
No we do not need to keep the Ten Commandments, as they were written. Jesus summed up the Ten Commandments.
(Matthew 22:39-40) “What is the greatest commandment of the Law? Jesus said, ‘You must love the Lord your God with all your heart, with all your soul, and with all your mind. This is the greatest and the first commandment. The second resembles it: You must love your neighbor us yourself. On these two commandments hang the whole Law,”