The jews literally changed their texts after Christ came and fulfilled their prophecy.
The basis of the Christian Old Testament is a source called the Septuagint (shortened to LXX). It was written over 2 centuries before Christ in Alexandria, Egypt, by Greek-speaking jews. It was the main source of the old Bible during the time of Christ and was preserved by Christians in the Old Testament. It has many verses that point directly to Christ.
However, in the second century AFTER Christ, the jews who rejected Christ decided to CHANGE THEIR OWN SCRIPTURES, to remove references to Christ and claim He did not properly fulfill prophecy. This is now known as the Masoretic Text and is the basis of the Hebrew Torah and some Old Testament translations of jew-influenced protestants.
Here's a taste of what they did:
Psalm 110:3
LXX: "With you is dominion in the day of your power, in the splendors of your saints; from the womb, before the morning star, I begot you."
MT: "Your people will offer themselves freely on the day of your power, in holy splendor; from the womb of the morning, the dew of your youth will be yours."
"I begot you" here is key for Jesus as the Son of God. The jews removed it
Isaiah 7:14
LXX: "Behold, a virgin shall conceive and bear a son."
MT: "Behold, a young woman shall conceive and bear a son."
Denial of the virgin birth for the Messiah
Psalm 22:16
LXX: "They pierced my hands and feet."
MT: "Like a lion, my hands and feet."
Removing the crucifixion from prophecy
There is more, but I encourage you to look this up yourself. The rabbit hole goes DEEP on this one. The entire idea of "judeo-Christian traditions" and Christians reading a "jewish book" is total BULLSHIT. YOU ARE BEING LIED TO, ALL OF YOU!