What did the eight signs in the Gospel of John show Israel about Jesus?
They were given to demonstrate that Jesus was the Son of God and the Messiah, and that He was the answer to Israel's every need. Their purpose was to prove His divine identity to the nation, and John's eight signs carried ramifications for Israel.
Les explains that the eight signs in the book of John had a specific purpose: to prove that Jesus was the Son of God. That was the whole purpose in them, and they also had ramifications on the nation of Israel. All of those signs were given to show Israel that not only was He the Son of God, not only was He the Messiah, but He was the answer to their every need.