I believe the Pharisees and such, glorified their own 'traditions' above God's law, rendering God's moral law ineffective.
Matthew 15:6 (KJV) And honour not his father or his mother, he shall be free. Thus have ye made the commandment of God of none effect by your tradition.
Mark 7:13 (KJV) Making the word of God of none effect through your tradition, which ye have delivered: and many such like things do ye.
Given that absolute truth is what we should strive toward, the text indicates that the Pharisees thought they were following not only the law of Moses, but also the traditions of the fathers, and that was a good thing.
That they thought their obedience to the law of Moses was intact, that alone was/is a problem. N mortal man ever lived the law of God to the satisfaction of the Lord, and yet groups today think that they can store up reward for trying...as if the Lord lowered the bar down from the level perfection so that man can try to offer up a few whisps of sweet-smelling vapors up to the Throne of God for heavenly rewards.
Why so many continue missing the point of what Jesus and His apostles said about this continues to evade my understanding.