Jesus acknowledged that the Jews were the descendants of Abraham, but that they weren’t the “children of Abraham” or the “children of God” anymore, but the “children of the devil”. Since Abraham is not their father, but the devil is, the promises that God gave to Abraham of those blessing Abrahams children being blessed does not apply to the Jews. They rejected Christ and are the children of the devil and not Abraham.
In John 8:37 Jesus said “I know you are Abraham’s descendants”.
in vs. 38, “If you were Abraham’s children,” said Jesus, “then you would[c] do what Abraham did.”
In vs 42, “If God were your Father, you would love me, for I have come here from God.
In vs 44, “You belong to your father, the devil, and you want to carry out your father’s desires.“
I agree as a fellow American
You’re right, the difference is that this group of people killed Jesus and was called the synagogue of Satan, children of Satan, a brood of vipers, and was told to be held responsible for the murder of all the prophets that came before by Jesus himself. They do not have a god given right to the promise land.
Jesus forgave them, He even said, 'Father forgive them, they know not what they do' and 'I lay my life down freely'. Peter preached to the them at pentecost with the voice of the Holy Spirit and many repented and were saved!
Don't miss the whole forest because you're looking at the trees in front of you.