Remember back in Matthew 23:1, 2; ""Then spake Jesus to the multitude, and to His disciples," [1] "Saying, "The scribes and the Pharisees sit in Moses seat:" [2]
And in John 8:44 He said, " Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it."

Moses was the law-giver and these Kenite scribes and Pharisees had taken over God's law and substituted their traditions for the law. They were rewriting the law without the authority to do so. Jesus identifies them as the Kenites, and that they claim to be of Judah, when in fact they are not. This is recorded in Revelation 2:9, and 3:9; and it identifies them as being of the synagogue of Satan.

H7014 Kenite
קין
qayin
kah'-yin
The same as H7013 (with a play upon the affinity to H7069); Kajin, the name of the first child, also of a place in Palestine, and of an Oriental tribe: - Cain, Kenite (-s).

When the house of Judah came out of Babylon at the time of Ezra and Nehemiah, four hundred years before the time of Jesus birth. When Ezra took note of the Levitical priesthood, there was not one member of the Levitical priesthood with them, the entire priesthood was taken over by the Nethinims, these Kenite foreigners which are the offspring of Cain. Not only had the priesthood been taken over, but we are told in I Chronicles 2:55, that the duties of the scribes were also taken over by the Kenites.

I Chronicles 2:55 "And the families of the scribes which dwelt at Jabez [Jerusalem] the Tirathites, the Shimeathites, and Suchathites. These are the Kenites that came of Hemath, the father of the house of Rechab."

The duties of the scribes were to keep the records, and protect the Holy Word by God through the Prophets. The Scribes were to protect God's Word. So you can see that by Jesus birth, these scribes and Pharisees [these Kenites] of the offspring of Satan through Cain had four hundred years to modify God's Word into their "traditions of men", and to this day that is still what is important to them, their traditions; Even in our Christian churches of this 21st. century, (their is nothing new under the sun). These traditions caused the House of the Lord [Temple] to be filled with these merchandisers and money changers.

Ecclesiastes 1:9 - KJV – The thing that hath been, it is that which shall be; and that which is done is that which shall be done: and there is no new thing under the sun.

They modified God's laws and created their own set of laws and rituals.