Doug, here is the proof of what I say that Jesus disciples understood and knew all this before Paul, Like I said before you focus so much on Paul that you have
forgotten the words of Jesus.
The disciples fully understood Jesus' death and resurrection after He rose from the dead and appeared to them. Even though Jesus told them multiple times that He would die and rise again (Matthew 16:21, Mark 9:31, Luke 18:31-34), they did not comprehend it at the time.
After the Resurrection, when Jesus appeared to them after rising from the dead, He explained everything again, and their minds were opened.
Luke 24:44-45 – "Then He said to them, ‘These are the words which I spoke to you while I was still with you, that all things must be fulfilled which were written in the Law of Moses and the Prophets and the Psalms concerning Me.’ And He opened their understanding, that they might comprehend the Scriptures."
When they saw the empty tomb and Jesus alive, at first, they doubted, but when they saw Him alive, they started to believe.
John 20:8-9 – "Then the other disciple, who came to the tomb first, went in also; and he saw and believed. For as yet they did not know the Scripture, that He must rise again from the dead."
Luke 24:36-39 – Jesus appeared to them and showed His hands and feet to prove He was alive.
When Jesus explained it to them again on the road to Emmaus, Jesus walked with two disciples and explained why He had to suffer and rise again.
Luke 24:25-27 – "Then He said to them, ‘O foolish ones, and slow of heart to believe in all that the prophets have spoken! Ought not the Christ to have suffered these things and to enter into His glory?’ And beginning at Moses and all the Prophets, He expounded to them in all the Scriptures the things concerning Himself."
To fulfill prophecy, the Scriptures had already foretold that the Messiah would suffer, die, and rise again.
Isaiah 53:5 – "But He was wounded for our transgressions, He was bruised for our iniquities; the chastisement for our peace was upon Him, and by His stripes we are healed."
To take away sin, His death was the ultimate sacrifice for sin.
Matthew 26:28 – "For this is My blood of the new covenant, which is shed for many for the remission of sins."
John 1:29 – "Behold! The Lamb of God who takes away the sin of the world!"
To defeat death and give eternal life, by rising from the dead, He proved that death had no power over Him and that believers could also have eternal life.
John 11:25 – "I am the resurrection and the life. He who believes in Me, though he may die, he shall live."
To show the way to God, His death and resurrection opened the path to salvation.
John 14:6 – "I am the way, the truth, and the life. No one comes to the Father except through Me."
The disciples finally understood the purpose of Jesus' death and resurrection when He appeared to them after rising from the dead and explained everything again. Their understanding was complete after He opened their minds to the Scriptures, showing them that His sacrifice was necessary to fulfill prophecy, take away sin, defeat death, and bring eternal life.
I hope You believe this that they knwe and understood. it is all from scripture and are the Words of Jesus who is One with GOD.