Bible Writer no longer could Israelites claim favour as God’s chosen people.
They had failed to keep the national agreement made at Mount Sinai.
They had failed to maintain undefiled worship of God, but permitted human traditions and human philosophy to corrupt it.
They failed to receive the One whom God had promised to send, but rejected him for Caesar and instigated his violent death.
For these reasons they were cut off from being God’s holy nation.
Their material house of worship was abandoned by God, just as Jesus said:
“Jerusalem, Jerusalem, the killer of the prophets and stoner of those sent forth to her how often I wanted to gather your children together, the way a hen gathers her chicks together under her wings! But you people did not want it. Look! your house is abandoned to you.”—Matt. 23:37, 38.
Proof of this abandonment came with the destruction of Jerusalem 70 C.E. at which time the temple was destroyed for the last time.
No longer could God’s worship be carried on at the place he had chosen and in the manner specified in the law covenant.
A New Covenant was now inaugurated which was a Spiritual arrangement by Jesus Christ, the fleshly nation Israel was now doomed, although the casting off of the Jewish national house of worship did not mean that individual Jews couldn't come into God’s favour.
The rejecting of that nation did not mean the rejecting of every individual in it, for a remnant of the nation did exercise faith and was brought into the new covenant Spiritual Israel was it not?
What you are saying is the very opposite of what we are clearly told in Romans 11:28-29, "Concerning the gospel
they are enemies for your sake, but concerning the election
they are beloved for the sake of the fathers. For the gifts and the calling of God
are irrevocable." (Romans 11:28-29)
Do you have any idea what the word "irrevocable" means? It is explained in the scriptures themselves.
This is stated in great plainness in the 89th Psalm, where God made his eternal promise to David: After the promise was made, God said:
“If his sons forsake My law
And do not walk in My judgments,
If they break My statutes
And do not keep My commandments,
Then I will punish their transgression with the rod,
And their iniquity with stripes.
Nevertheless My lovingkindness I will not utterly take from him,
Nor allow My faithfulness to fail.
My covenant I will not break,
Nor alter the word that has gone out of My lips.”
(Psalm 89:30-34)
Here God very explicitly said that his promise to David could not even be canceled by sin. He made it clear that He would deal with any sin that might be committed, but that the promise would still stand unchanged.
And when you quoted scripture to back up your claim you stopped one verse too soon.
Jesus continued: "for I say to you, you shall see Me no more
till you say,
'Blessed is He who comes in the name of the LORD!' " (Matthew 23:39)
We find this again in Romans 11:25, where we read, "For I do not desire, brethren, that you should be ignorant of this mystery, lest you should be wise in your own opinion, that blindness in part has happened to Israel
until the fullness of the Gentiles has come in." (Romans 11:25)
This "till" and "until" do not mean "unless." Jesus and the Holy Spirit, speaking through the Apostle Paul, both spoke of a time when this rejection and blindness would end.
The scriptures are full of places where we are told both of this rejection and of the fact that it would only be temporary.
Romans 9:25-26.
As an example, in Hosea 2:23 we read, “Then I will sow her for Myself in the earth, And I will have mercy on her who had not obtained mercy; Then I will say to those who were not My people, ‘You are My people!’ And they shall say, ‘You are my God!’” The second part, “And it shall come to pass in the place where it was said to them, ‘You are not My people,’ There they shall be called sons of the living God.” is a quotation from Hosea 1:10, where we read, “Yet the number of the children of Israel Shall be as the sand of the sea, Which cannot be measured or numbered. And it shall come to pass In the place where it was said to them, ‘You are not My people,’ There it shall be said to them, ‘You are sons of the living God.’”
In both of these places, some might imagine that these passages refer to the church. But a close examination shows that this is cannot even possibly be their meaning. Looking at the last passage first, for it was first in the Order God gave them in Hosea, verses 1-9 of Hosea 1 detail God’s rejection of “the house of Israel.” (verse 8) Then we read the wonderful promise that, even though they were rejected, “it shall come to pass In the place where it was said to them, ‘You are not My people,’ There it shall be said to them, ‘You are sons of the living God.’” This blessing, “You are sons of the living God,” was not to be said to someone else, but “it shall be said to them.” The very ones to whom God had said, “Lo-ruhamah” (not pitied) and “Lo-ammi” (not my people,) would be told, “You are sons of the living God.” But they would not only be told this, but they would be told this in the very place where they had been so cursed. This is concluded in the first verse of chapter 2. (We must remember that the chapter and verse divisions in our Bibles were added by man, there were no such divisions in the scriptures when God first gave them. And in some places the divisions actually break up what God was saying.) So God concluded this portion of his holy word by saying, “Say to your brethren, ‘My people,’ And to your sisters, ‘Mercy is shown.’” (Hosea 2:1) To whom were these words to be said? To the church? No. They were to be said “to your brethren.” and “to your sisters.” Whose “brethren” and “sisters” were to be told “My people,” and “Mercy is shown.”? The very ones to whom it was said “Lo-ruhamah” and “Lo-ammi.” These were unquestionably the sinning “house of Israel.” No scripture anywhere even suggests the idea that either the church or its individual members are the “brethren” and “sisters” of the “house of Israel.”