Romans 15:4 ESV
“For whatever was written in former days was written for our instruction, that through endurance and through the encouragement of the Scriptures we might have hope.”
The Jewish people have the writings of the Old Testament available to them, but most do not read to understand. If the Jewish people would read and study the Old Testament, they would see that Jesus is the Messiah But most have chosen not to read and believe.
You and I have the Old and New Testament available to us, we can accept the hope of the word and flourish in it, or we can reject the hope of the word and be miserable. Which way do you choose?