The Bible is clear. CHRISTIANS are the descendants of Abraham & receivers of the promises … (it’s not “replacement” theology. It’s BIBLICAL theology. It’s not about a physical kingdom either. That’s not going to happen. See how Luke 17:20-21 obliterates the physical, visible kingdom false theory. “My kingdom is NOT coming in ways that be observed, nor will one say ‘look, here it is, or look, there it is!'”
Galatians 3:28
There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus. 29 And if you are Christ’s, then you are Abraham’s offspring, heirs according to promise.
Matthew 3:9 (Jesus speaking to Israelites)
9 And do not presume to say to yourselves, ‘We have Abraham as our father,’ for I tell you, God is able from these stones to raise up children for Abraham.
Peter 2:
4 As you come to him, a living stone rejected by men but in the sight of God chosen and precious, 5 you yourselves like living stones are being built up as a spiritual house, to be a holy priesthood, to offer spiritual sacrifices acceptable to God through Jesus Christ.
Romans 6b and 7a:
For not all who are descended from Israel belong to Israel, 7 and not all are children of Abraham because they are his offspring
1 Peter2:
9 But you are a chosen race, a royal priesthood, a holy nation, a people for his own possession, that you may proclaim the excellencies of him who called you out of darkness into his marvelous light.
10 Once you were not a people, but now you are God’s people; once you had not received mercy, but now you have received mercy.
Romans 9:8
This means that it is not the children of the flesh who are the children of God, but the children of the promise are counted as offspring.