"The Law here in not the human law of the Pharisees or the Tradition of the RC Church - it is the Holy Scripture."
More specifically, it is the Septuagint Old Testament, and not the New Testament at all, given that it had not been written yet when Jesus said that. Jesus' biblical quotes almost invariably use the Septuagint form (where it varies from the Hebrew text of the Massoretes).
That the NEW Testament is "Scripture", and contained under what Jesus said there, is a tradition of the Catholic Church, dating from the 3rd or 4th Century. What Jesus is talking about here was the Jewish Scripture, not the New Testament.
So you deny that the New Testament is God-breathed?