As usual you post without quoting any Scriptural basis for your opinion.
Those assertions come from old covenant prophecy, NOT new covenant prophecy, normally referring, in context, to the exile to Babylon & the return. e.g. Ezec. 36.
But note in that chapter vs 24-28 which is a prophecy of Pentecost when many thousands of Jews & proselytes
devout men, out of every nation under heaven. Thousands were saved & baptised. The allusion to water baptism relates to Exo. 24 when the blood of the old covenant was sprinkled on the people on confession of obedience.
You agreed, a few posts back, that prophecy refers to Christ rather than Israel.
The coming, & saving work of Christ was in fulfilment of prophecy. At Pentecost, Peter declared
"this is that which was spoken by the prophet Joel" concerning the
last days.
Many thousands of Jews from many nations did indeed repent & receive the blessing promised. There was no promise reserved for those who rejected the Messiah, only dreadful judgement.
Acts 3:22 For Moses truly said unto the fathers, A prophet shall the Lord your God raise up unto you of your brethren, like unto me; him shall ye hear in all things whatsoever he shall say unto you. 23 And it shall come to pass, that every soul, which will not hear that prophet, shall be destroyed from among the people.
That judgment took place in AD 70.
The believing Jews reluctantly accepted Gentile believers as fellow believers. Acts 15. As they were rejected by the unbelieving Jewish community & Synagogues, their Jewish customs would soon lose significance, so in a generation or two the blessed & believing Jews would lose their Jewish identity. Not a Gentile church, but a Christian church where all were one.
Gal. 3: 26 For ye are all the children of God by faith in Christ Jesus. 27 For as many of you as have been baptized into Christ have put on Christ. 28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. 29 And if ye be Christ’s, then are ye Abraham’s seed, and heirs according to the promise.
Jews are welcomed by the Gospel, but not because they claim to be Abraham's seed, but because they come to Jesus in repentance & faith. And waiting for the Messiah is foolish. He came & completed his saving work.