God cut off and hardened the Jews when Jesus was on the earth, because there was a new covenant going to be made, and those Jews who already belonged to God by faith had to go through Jesus. They were God's, but now they had to go through Jesus to remain God's. Jesus said he would not lose one that God gave him.
Luke 19:42 and said, "If you, even you, had only known on this day what would bring you peace--but now it is hidden from your eyes.
Luke 8:10
He said, "The knowledge of the secrets of the kingdom of God has been given to you, but to others I speak in parables, so that, "'though seeing, they may not see; though hearing, they may not understand.'
John 12:40
"He has blinded their eyes and hardened their hearts, so they can neither see with their eyes, nor understand with their hearts, nor turn--and I would heal them."
Romans 11:8
as it is written: "God gave them a spirit of stupor, eyes that could not see and ears that could not hear, to this very day."
Matthew 13:14
In them is fulfilled the prophecy of Isaiah: "'You will be ever hearing but never understanding; you will be ever seeing but never perceiving.
Mark 4:12 so that, "'they may be ever seeing but never perceiving, and ever hearing but never understanding; otherwise they might turn and be forgiven!'"
Mark 8:17And Jesus, aware of this, said to them, "Why do you discuss the fact that you have no bread? Do you not yet see or understand? Do you have a hardened heart? 18"HAVING EYES, DO YOU NOT SEE? AND HAVING EARS, DO YOU NOT HEAR? And do you not remember,