I have no idea what you're trying to say. Can you do me a favor and tell me how you interpret these passages:
Romans 9:6 It is not as though God’s word had failed. For not all who are descended from Israel are Israel. 7 Nor because they are his descendants are they all Abraham’s children. On the contrary, “It is through Isaac that your offspring will be reckoned.” 8 In other words, it is not the children by physical descent who are God’s children, but it is the children of the promise who are regarded as Abraham’s offspring.
Galatians 3:16 The promises were spoken to Abraham and to his seed. Scripture does not say “and to seeds,” meaning many people, but “and to your seed,” meaning one person, who is Christ....26 So in Christ Jesus you are all children of God through faith, 27 for all of you who were baptized into Christ have clothed yourselves with Christ. 28 There is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus. 29 If you belong to Christ, then you are Abraham’s seed, and heirs according to the promise.
Paul is saying, forget about Israel.
Paul is saying nor should we consider Ishmael, but Isaac.
I would add Esau was also despised. Israel can be to if they act like Esau did.
When humans start picking and choosing it goes against God and God's will.
Abraham's seed, all of it, will bless the world, even the seed that God "hates". It is based on Abraham's relationship with God, not the billions of offspring. Some will be hated by God, and some favored. But as a whole God sees them through Abraham corporately.
So salvation is not based in Abraham nor Israel, not even the Old Covenant given to Moses. At the time of Moses, this was already ancient history. The Jews of Paul's days were trying to live off of Abraham's blessing as the Covenant, but Paul said, "NO WAY".
It was Adam that brought sin into the world, and Jesus Christ would take it out. The Atonement had nothing to do with Abraham, Israel, nor the Old Covenant.
Then Paul says, that promise to Abraham, is now centered through Jesus Christ. You are grafted into the tree just like Abraham's seed was born into the tree. That is why the tree is not Israel, nor Abraham, and never was the OT as given to Moses with the Law. It was always Christ, and Abraham's seed were just natural branches, because they are, and always will be, God's chosen people. At least those God does not despise.
Not that I accept one can loose their salvation based on works, but clearly when it comes to being chosen for blessings, God can withhold blessings, but Atonement, no! God says Atonement is shed abroad to all people now. Gentiles are no different than Abraham's seed. Can you choose to reject God at the end of your life? Why not?
Is that you loosing it, or rejecting it? If you reject an item, you never had it. God never accepted your false acceptance, knowing you would reject at the end. Does God remind you through out your life, you will one day turn your back on God? The Atonement was given at one time in such a way it is impossible to loose.