Jew and Gentile will yet literally become one in Jesus Christ, Ephesians chapter two. Although still unrepentant in our present time, the Jews will finally repent and confess their sins and bring great glory to God, to the gospel, and to themselves.

“40 If they confess their iniquity, and the iniquity of their fathers, in their trespass which they trespassed against me, and also that, because they walked contrary to me, 41 I also walked contrary to them, and brought them into the land of their enemies: if then their uncircumcised heart is humbled, and they then accept the punishment of their iniquity; 42 then I will remember my covenant with Jacob; and also my covenant with Isaac, and also my covenant with Abraham; and I will remember the land.”
Lev 26:40-42 KJV

The sorrow of the Jews for their sins
will be great.

“I will pour on the house of David, and on the inhabitants of Jerusalem, the spirit of grace and of supplication; and they will look to mea whom they have pierced; and they shall mourn for him, as one mourns for his only son, and will grieve bitterly for him, as one grieves for his firstborn.”
Zech 12:10

This description goes on into Zechariah thirteen. The third part of the Jews which escapes the sword at the hand of the nations will then be purified.

“I will bring the third part into the fire,
And will refine them as silver is refined,
And will test them like gold is tested.
They will call on my name, and I will hear them.
I will say, ‘It is my people;’
And they will say, ‘Yahweh is my God.’””
Zech 13:9

The cartels will be stripped of their unjust gains.

“…
And you will beat in pieces many peoples:
And I will devote their gain to Yahweh,
And their substance to the Lord of the whole earth.”
Mic 4:13

God will choose some of the Jews to finish declaring the salvation of God to all the nations.

“I will set a sign among them, and I will send such as escape of them to the nations, to Tarshish, Pul, and Lud, who draw the bow, to Tubal and Javan, to the isles afar off, who have not heard my fame, neither have seen my glory; and they shall declare my glory among the nations.”
Isa 66:19

The earth will finally be filled with the knowledge of the Lord. ALL nations will have an opportunity for salvation.

How long will this take? I do not know. I does not tell. But it will be a time of great glory for the Jewish nation.

And then comes the end!

“11 Many false prophets will arise, and will lead many astray. 12 Because iniquity will be multiplied, the love of many will grow cold. 13 But he who endures to the end, the same will be saved. 14 This gospel of the kingdom will be preached in the whole world for a testimony to all the nations, and then the end will come.”
Mtt 24:11-14

Unless otherwise noted, Scriptures are from the World English Bible WEB, a copyright free revision
of the original ASV American Standard Version 1901.