Here are several passages where Jews speak of a Messiah/Christ:
Originally Posted by Alaska
John 1:41 - He first found his own brother Simon, and said to him, “We have found the Messiah” (which is translated, the Christ).
John 4:25 - The woman said to Him, “I know that Messiah is coming” (who is called Christ). “When He comes, He will tell us all things.”
Matthew 22:42 - saying, “What do you think about the Christ? Whose Son is He?” They said to Him, “ The Son of David.”
Matthew 26:63 - But Jesus kept silent. And the high priest answered and said to Him, “I put You under oath by the living God: Tell us if You are the Christ, the Son of God!”
Mark 14:61 - But He kept silent and answered nothing. Again the high priest asked Him, saying to Him, “Are You the Christ, the Son of the Blessed?”
Luke 2:26 - And it had been revealed to him by the Holy Spirit that he would not see death before he had seen the Lord’s Christ.
Luke 3:15 - Now as the people were in expectation, and all reasoned in their hearts about John, whether he was the Christ or not,
John 1:20 - He confessed, and did not deny, but confessed, “I am not the Christ.”
John 4:29 - “Come, see a Man who told me all things that I ever did. Could this be the Christ?”
This is just a small sample, there are many others, that reveal to us that the Jews most definitely understood that there was a Messiah/Christ who was prophesied to come. That this Christ would be the Son of God (Matthew 26:63). They understood that Christ would restore and save Israel.
Some even wondered if John the Baptist was Christ. Which he clearly denied and pointed to Jesus.
Now, all that to say that obviously the Jews were able to understand the OT prophesies well enough to realize that God was going to send His Son, the Christ, to redeem Israel.
Perfect knowledge of Jesus is not needed to be saved. If it was then none of us would be saved because we are not perfect in our knowledge.
All that is required is a simple trust in the One who is the Christ. To put all our faith in Him and His atoning work. The OT saints looked forward to Him and we look back to Him but our focus is still on the same person and work of Jesus Christ alone, apart from any works of merit on our part.
Faith = Trusting in Christ alone as the atoning and redeeming One.
WDJD - what DID Jesus do
He died on a cross for our sin and rose from the dead,
securing, for all who believe, eternal life and forgiveness of sin