Things do not have to start with A but they can evolve into a B, no? That particular B is recognized by all to be Jews.
So are you saying G-d’s promise is for all Mankind?
“Abraham “seeded” the future Jewish people. Any arguments here?”
And He took him outside and said, “Now look toward the heavens, and count the stars, if you are able to count them.” And He said to him, “So shall your descendants be.” Then he believed in the LORD; and He reckoned it to him as righteousness. Genesis 15:5-6
For the promise to Abraham or to his descendants that he would be heir of the world was not through the Law, but through the righteousness of faith. For if those who are of the Law are heirs, faith is made void and the promise is nullified; for the Law brings about wrath, but where there is no law, there also is no violation.
For this reason it is by faith, in order that it may be in accordance with grace, so that the promise will be guaranteed to all the descendants, not only to those who are of the Law, but also to those who are of the faith of Abraham, who is the father of us all, (as it is written, “A FATHER OF MANY NATIONS HAVE I MADE YOU”) in the presence of Him whom he believed, even God, who gives life to the dead and calls into being that which does not exist. Romans 4:13-17
All who share in the faith of Abraham through Christ share in the promise God gave him.
“The fact that he was not a Jew is as relevant as Christ being a Jew but Paul founding a new faith, no?”
Paul was a Jew (a Pharisee who persecuted believers in Christ before his conversion.) And Paul didn’t found Christianity: Jesus Christ did. Paul and the other apostles were simply messengers of the good news.
“Things do not have to start with A but they can evolve into a B, no? That particular B is recognized by all to be Jews.”
First, your question assumes God’s plan was “evolving.” His plan of redemption for all of mankind was in motion the day He created mankind. Our understanding of His plan may evolve, but His plan has never evolved.
For He was foreknown before the foundation of the world, but has appeared in these last times for the sake of you who through Him are believers in God, who raised Him from the dead and gave Him glory, so that your faith and hope are in God. 1 Peter 1:20-21
But, as noted in the citation from Paul I posted, those early Jews who believed in Christ believed the promise of redemption through faith in Christ was available to all.
“So are you saying G-d’s promise is for all Mankind?”
Yep.