We know that Mankind are Fallen

We know that all mankind are fallen, we all bear the stain of Adams sin.
But Jesus came to redeem a people for Himself with His blood. Ephesians 1:7

Believers in Jesus, those who have accepted His Salvation, are now people from every tribe, race, nation and language. Revelation 5:9-10 But God originally chose a people group to be the ones who would be His Witnesses and to display His Light to the world. Those people failed in their task and were ejected for the holy Land in two dispersions.
Those of the second diaspora; the Jewish people have come back to a part of the holy Land, but still in unbelief and apostasy.

The Bible tells us in many prophesies; that all of Israel, who are by now an uncountable multitude, will return to the holy Land and will fulfil at last, God’s plan for them.
The New Testament tells about a symbolic Olive Tree, one that has had all its branches removed. That Tree is Jesus and all who believe in Him, will be grafted into that Tree.
So whether we Christians are actual descendants of Jacob or not, the people who will fulfil God’s Plan for a righteous people in His Land; will all be Christians.

In fact being born into the Kingdom, as the Jewish people purport to be, seems to be undesirable! Matthew 8:11-12 Many will come from the East and the West and sit with the Patriarchs….but those who were born to the Kingdom, will be thrown out…… ����