You are encountering something called "Replacement theology", the belief by some Christians that G-d has discarded the Jews and given Christians his covenant. Aside from the fact that this directly contradicts the Torah and is based on classic antisemitism, even their own bible does not support this or the idea we are forever responsible.
While it is true that their bible says a mob goaded Pilate into ordering the execution of Jesus, ultimately he was killed by the Romans. Somehow you don't see Christians claiming the Romans have "generational guilt" for killing their Messiah.
- The Jews were not in charge of Israel when Jesus lived, the Romans were. Apparently G-d decided to punish us for rejecting their Messiah ahead of schedule. The Jewish authorities did not have the power to order anyone killed.
- Crucifixion is not the method of execution for blasphemy in the Torah. In fact we are to avoid cruel and unusual punishment.
- Even if the Jews had been in power, the burden of proof for blasphemy charges are VERY high. In the Talmud it mentions rabbis having a discussion where they could only recall one time such an execution had ever been carried out in their lifetime. Even then they only heard about it, meaning it may not have even happened. There are no written records of anyone in Israel ever being executed for blasphemy charges.
- The Torah, in fact numerous times in the Tanakh HaShem specifically says people are not responsible for the sins of others.
You forget that Pilot found no guilt in Christ and was going to let him go. But the Jews raised such a fuss about he decided to see what they really wanted. He gave them a choice of a known criminal or Christ and they chose the criminal. Then he asked them what they wanted to do with Jesus and they wanted a crucifixion. He gave them what they wanted and washed his hands of the whole thing. Yes the Roman's did the act. But Jews wanted it. Note what Peter a Jew says.
“Men of Isra’el! Listen to this! Yeshua from Natzeret was a man demonstrated to you to have been from God by the powerful works, miracles and signs that God performed through him in your presence. You yourselves know this. This man was arrested in accordance with God’s predetermined plan and foreknowledge; and, through the agency of persons not bound by the Torah, you nailed him up on a stake and killed him! “But God has raised him up and freed him from the suffering of death; it was impossible that death could keep its hold on him. For David says this about him:‘I saw always before me,for he is at my right hand,so that I will not be shaken. “Brothers, I know I can say to you frankly that the patriarch David died and was buried — his tomb is with us to this day. Therefore, since he was a prophet and knew that God had sworn an oath to him that one of his descendants would sit on his throne, he was speaking in advance about the resurrection of the Messiah, that it was he who was not abandoned in Sh’ol and whose flesh did not see decay. God raised up this Yeshua! And we are all witnesses of it! “Moreover, he has been exalted to the right hand of God; has received from the Father what he promised, namely, the Ruach HaKodesh; and has poured out this gift, which you are both seeing and hearing. For David did not ascend into heaven. But he says, Therefore, let the whole house of Isra’el know beyond doubt that God has made him both Lord and Messiah — this Yeshua, whom you executed on a stake!” On hearing this, they were stung in their hearts; and they said to Kefa and the other emissaries, “Brothers, what should we do?” Kefa answered them, “Turn from sin, return to God, and each of you be immersed on the authority of Yeshua the Messiah into forgiveness of your sins, and you will receive the gift of the Ruach HaKodesh! For the promise is for you, for your children, and for those far away — as many as our God may call!”
“Men of Isra’el! Listen to this! Yeshua from Natzeret was a man demonstrated to you to have been from God by the powerful works, miracles and signs that God performed through him in your presence. You yourselves know this.
www.biblegateway.com
He said the Jews killed Chrust through the Romans.
But the thing is this wax God's plan through his foreknowledge. He knew what would happen when he sent the Messiah. Jesus will be the judge if all mankind. And you won't find me yelling at the Jews. Those Jews are long gone. You are not responsible fir Christ's death. You are only responsible for yourself and the decisions you make. Same as everyone else. You aren't responsible for the Crucifixion for being a Jew anymore than I'm responsible for slavery in America because I'm white.
You are only responsible for what you do with the Messiah.