Hi there!
That line is taken from Romans 9 through 11, where the Apostle Paul gives the one complete NT teaching on the subject...
there’s more but:
Romans 11
King James Version (KJV)
11 I say then, Hath God cast away his people? God forbid! For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.
2 God hath not cast away his people which he foreknew
26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
27 For this is my covenant unto them, when I shall take away their sins.
28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the father’s sakes.
29 For the gifts and calling of God are irrevocable.
I am very familiar with the book of Romans. I am not here to debate, but to understand what your belief is. From your answer, I am assuming that you believe that some people will enter into heaven because of their genetic makeup and not because they put faith in Jesus Christ. Also that you believe every Jewish person will come to faith in Christ Jesus and that if a Jew denies that Jesus is the son of God that they have eternal life?
Is this correct? Is this what you believe.