How long has Israel been demanding signs?
Israel's demand for signs reaches back to Moses' call, when God gave supernatural proof to Moses and Aaron. That pattern continued throughout Israel's history and into Christ's earthly ministry, where miracles confirmed His identity to the Jews. Scripture states the Jews require a sign.
Les explains that in 1 Corinthians 1:22, the Jews require a sign. He asks how long Israel has been demanding signs, then traces it back to Moses being called out of the desert. Moses himself did not believe he was supposed to do what God wanted, so God proved it by having him throw his shepherd's rod on the ground, where it became a serpent, and when he picked it up, it was a rod again. God told Moses and Aaron the same thing, and Les notes these signs were not so much for Pharaoh's benefit but for Moses and Aaron, to prove God would do the supernatural and bring Israel out of Egypt. All the way up through Israel's history you have the supernatural, and in Christ's earthly ministry Jesus performed miracle after miracle to prove to the Jew that He was who He said He was. John records seven miraculous signs, each with a trainload of truth for the nation of Israel.