Yes, Jesus blood absolves us all, past, present and future. However, for 2000 years the church has taught that a person (Jew and Gentile) must believe/receive the blood of Christ for the remission of his sins. The 2 thieves who were crucified with Jesus offer a sobering example. One of the thieves expressed faith that Jesus would enter heaven and asked Jesus to remember him. Jesus told him that he would be with Him in paradise that day. The other thief berated Jesus and challenged his authority. Jesus was silent toward that thief.
The unbelieving Jew of today has the same problem that the unbelieving Jews of Jesus' day had (paraphrase)...'We have Moses and the Prophets and we do not believe you are Messiah'...."Again the high priest asked him, and said unto him, Art thou the Christ, the Son of the Blessed? And Jesus said, I am ... Then the high priest rent his clothes, and saith, What need we any further witnesses? Ye have heard the blasphemy: what think ye? And they all condemned him to be guilty of death."
Messiah is spoken of throughout the New Testament as both an all powerful potentate and a suffering servant. Christians know that Jesus was the suffering servant, the sacrificial lamb for our sins - and we also know He will sit on David's throne as King of kings and Lord of lords when He returns.
Many Jews today, like the early disciples, have come to the knowledge of Messiah (Christ). Sadly, the majority have not but the day is coming when all Israel (all Jews) will see and know Jesus for who He is. Paul describes that day as a resurrection. Praise God!!
“And I will pour out on the house of David and the inhabitants of Jerusalem a spirit of grace and pleas for mercy, so that, when they look on me, on him whom they have pierced, they shall mourn for him, as one mourns for an only child, and weep bitterly over him, as one weeps over a firstborn.” Zachariah 12:10
https://jewsforjesus.org/jewish-resources/messianic-prophecy/the-messiah-would-be-the-suffering-servant/
"Messiah is spoken of throughout the New Testament" should read:
"Messiah is spoken of throughout the OLD Testament"'