Actually, that has not... happened yet today.
Only Jews of the "house of Judah" have been returning to the state of Israel in the holy land. The ten tribes ("house of Israel") are still lost to themselves and to the world today. When Jesus comes is when these events of their joining back with the house of Judah will occur.
This is how the matter about the ten lost tribed house of Israel is important for Christ's Church, because that's where the majority of them are today, scattered among the Gentiles where The Gospel was preached after the passion of Christ. Thus when the scattered remnants of the ten lost tribed house of Israel are gathered, the believing Gentiles will be gathered along with them.
God's Birthright to His chosen is very specific in His Word, and with the promises it included.
The Birthright began with Abraham. Then...
... to Isaac,
... to Jacob (named Israel),
... to Reuben (but he defiled his father's bed),
... to Joseph,
... to Joseph's two sons Ephraim and Manasseh, where it still is today.
Per Genesis 35, Jacob's seed was promised to become "a company of nations". And per Genesis 48, Ephraim's seed was promised to become "a multitude of nations." Jacob blessed Ephraim and Manasseh, both sons of Joseph, and said to let his name Israel be named upon the lads.
In case you haven't figured out what that means, it means Ephraim's seed was to literally become "a multitude of nations", not just one nation like the state of Israel in the holy land. This is why Apostle Paul in Ephesians 2 would proclaim Gentile believers on Christ as having come into the promises and covenants given Israel, their becoming part of the "commonwealth of Israel". A commonwealth means more than one, pointing to more than one nation.
But the state of Israel in the holy land has only ever... been but ONE nation, not "a company of nations" nor "a multitude of nations" like the Genesis prophecies state.
What's contained in God's Birthright beginning with Abraham?
God promised Abraham...
1. that a seed from him would be as many of the stars of the sky and sands of the sea (Gen.15).
2. that God would given him the lands as far as he could see in all directions in the middle east (Gen.13).
3. Abraham would become a father of many nations (Gen.17).
4. that his seed would possess the gate of his enemies (Gen.22)...
... it continued with his son Isaac per Gen.26...
... it then was passed to Jacob with more added, as per Gen.27 Jacob's seed would receive...
1. the dew of heaven (symbolic of best lands)
2. the fatness of the earth (symbolic again of the best lands and natural resources)
3. plenty of corn and wine (further symbolic of the best farm and vineyard producing lands)
4. nations would bow down to thee...
... the Birthright then continued to Joseph...
... and Joseph would be exalted by God above his eleven brethren, and even above his father and mother by God giving Joseph to interpret Pharaoh's dream (Gen.37; Gen.40)...
... the Birthright was then passed by Jacob to Joseph's younger son Ephraim, and also that his elder son Manasseh would also become "great" (Gen.48).
The other part of God's Birthright would remain with Judah and the house of David involving the royal scepter rule on the throne, and also care of God's law to His people.
1 Chron 5:1-2
5:1 Now the sons of Reuben the firstborn of Israel, (for he was the firstborn; but, forasmuch as he defiled his father's bed, his birthright was given unto the sons of Joseph the son of Israel: and the genealogy is not to be reckoned after the birthright.
2 For Judah prevailed above his brethren, and of him came the chief ruler; but the birthright was Joseph's
KJV
Thus God's Birthright blessings went to Joseph, and then Joseph's two sons (Ephraim and Manasseh), but the chief ruler would be of the tribe of Judah. This is how God's Birthright is still established on earth among His people today, but NOT... in the holy lands!
Isn't anyone understanding more of why when God split Israel into two kingdoms after Solomon's reign, that He would give "ten tribes" to Jeroboam of the tribe of EPHRAIM as their king to rule over them? (1 Kings 11 forward).
Where have the best crop producing lands on earth been, with a people producing much more food than they can consume? The Christian west.
Where has the most abundant resources existed with the ability to retrieve them been? In the Christian west.
Where has had the greatest wine vineyards? The Christian west.
What nations have controlled the gates (coming and goings) of their enemies? The Christian west, with their navies and great military might.
Have we seen these Promises existing in the holy land through history? NO!
Only in 1948 when Israel became a nation state again in the middle east has the land begin to blossom again. And still... there is not one of the house of Judah and house of David sitting upon a throne there in Jerusalem, not since Jeremiah's day when king Zedekiah of Judah was there. Yet the Genesis 49:10 prophecy to Judah for the "latter days" through Jacob is one of Judah is still... supposed to be sitting upon David's throne ON EARTH all the way up to Christ's ("Shiloh") second coming!
So WHERE on earth in the latter days have we seen these Promises manifested? In the Christian west of course. The western nations, which the majority of them were historically known... as Christian nations, still reveal they are the receivers of God's Birthright blessings that would remain with Joseph's two sons Ephraim and Manasseh.
Israel in the West = Ephraim and Manasseh over the ten lost tribed house of Israel with believing Gentiles with them as Paul's "commonwealth" (Eph.2). The SEAT of The Gospel of Jesus Christ. Many of the scattered remnant of the house of Judah are also there with them.
Israel in the middle east = Judah, or house of Judah, mostly still rejecting our Lord Jesus Christ, but will one day have their blindness from God removed (Rom.11).
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