Certainly, but "they are not all Israel, which are of Israel."
Your misunderstanding obscures the Good News of the Gospel and denies the genuine sorrow Paul felt for those Jews who did not believe in Jesus Christ...
That I have great heaviness and continual sorrow in my heart. For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh: Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and the service of God, and the promises; Whose are the fathers, and of whom as concerning the flesh Christ came, who is over all, God blessed for ever. Amen. Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel: Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called. That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed. For this is the word of promise, At this time will I come, and Sarah shall have a son. And not only this; but when Rebecca also had conceived by one, even by our father Isaac; (For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth;) It was said unto her, The elder shall serve the younger." -- Romans 9:1-12"I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost,
Nope friend. Sorry. Their calling is irrevocable.
If you read Paul in Romans and elsewhere very carefully, you will discover that the calling is irrevocable only as his Jewish brethren after the flesh come to saving faith in the Messiah Jesus Christ. All the Jews that have lived and died in the last 2000 years without believing in Jesus Christ are eternally lost. Their circumcision and lineage cannot save them.
"And do not think to say to yourselves, 'We have Abraham as our father.' For I say to you that God is able to raise up children to Abraham from these stones." (Matt. 3:9)
"For he is not a Jew who is one outwardly, nor is circumcision that which is outward in the flesh; but he is a Jew who is one inwardly; and circumcision is that of the heart, in the Spirit, not in the letter; whose praise is not from men but from God." (Rom. 2:28,29)
"But it is not that the word of God has taken no effect. For they are not all Israel who are of Israel, nor are they all children because they are the seed of Abraham; but, 'In Isaac your seed shall be called.'" (Rom. 9:6,7)
"There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus. And if you are Christ's, then you are Abraham's seed, and heirs according to the promise." (Gal. 3:28,29)
Only those Jews after the flesh who profess their faith in the Messiah Jesus are called blessed along with Father Abraham. They share the faith of Abraham.