Not true
Jews are of Judah and Israel was taken away so that the plan of salvation would continue through the seed of Abraham through faith [which the Jews failed at seriously many times and still continue to fail at today].
Ephraim represents the "lost" ten tribes of Israel and they became Christian Europe and their children in the New World.
Romans 9:6 But not as though the word of God hath failed. For they are not all Israel, that are of Israel:
9:7 neither, because they are Abraham’s seed, are all children but, In Isaac shall thy seed be called.
9:8 That is, the children of the flesh- they are not children of God; but the children of the promise are reckoned for a seed.
Romans 10:19 But I say, Did Israel not know? First Moses saith, I will provoke you to jealousy with what is no nation, With a nation void of understanding will I enrage you.
10:20 And Isaiah is very bold, and saith, I was found of them that sought me not; I became manifest to them that asked not of me.
Jeremiah 31:31 “Behold, the days are coming, declares the LORD, when I will make
a new covenant with the house of Israel and the house of Judah,
31:32 not like the covenant that I made with their fathers on the day when I took them by the hand to bring them out of the land of Egypt, my covenant that they broke, though I was their husband, declares the LORD.
31:33
For this is the covenant that I will make with the house of Israel after those days, declares the LORD: I will put my law within them, and I will write it on their hearts. And I will be their God, and they shall be my people.
31:34 And no longer shall each one teach his neighbour and each his brother, saying, ‘Know the LORD,’ for they shall all know me, from the least of them to the greatest, declares the LORD. For I will forgive their iniquity,
and I will remember their sin no more.”
God has made his new covenant with the house of Israel - Pentecost > the Spirit-filled ekklesia with signs following. A new and living way through the Spirit of God and not the letter of the Law.
Judah has not embraced nor received this new covenant as yet. That will occur when Armageddon has almost destroyed Jerusalem and Judah and then God will pour out his Holy Spirit upon the survivors and ...
Zechariah 12:8 On that day the LORD will protect the inhabitants of Jerusalem, so that the feeblest among them on that day shall be like David, and the house of David shall be like God, like the angel of the LORD, going before them.
9 And on that day I will seek to destroy all the nations that come against Jerusalem.
10 “And I will pour out on the house of David and the inhabitants of Jerusalem a spirit of grace and pleas for mercy, so that, when they look on me, on him whom they have pierced, they shall mourn for him, as one mourns for an only child, and weep bitterly over him, as one weeps over a firstborn.
Ezekiel 37:20 When the sticks on which you write are in your hand before their eyes,
21 then say to them, Thus says the Lord GOD: Behold, I will take the people of Israel from the nations among which they have gone, and will gather them from all around, and bring them to their own land.
22 And I will make them one nation in the land, on the mountains of Israel. And one king shall be king over them all,
and they shall be no longer two nations, and no longer divided into two kingdoms.