But there is still the nation Israel that God had not forgotten,
and God will fulfill his promise made to their father Abraham in the future, as Paul explained in
Romans 11.
God *has* fulfilled His promise made to Abraham through Jesus. As JGR is pointing out.... the promise was to the seed (singular) of Abraham....pointing to Christ Jesus.
As I've posted before... the most grievous form of Replacement Theology is the one that steals away the completed fulfillment of the promises through Christ....and replaces that for a future anticipated fulfillment through a secular geopolitical entity that the Bible was never even referring to. IOW....that theological framework
replaces Christ Jesus with a secular geopolitical formation named by humans (not God).
As far as what the Bible says (specifically Paul) about the promises to Adam, Abraham, Moses, and David....
2 Corinthians 1:20 ~ For all of God’s promises have been fulfilled in Christ with a resounding “Yes!” And through Christ, our “Amen” (which means “Yes”) ascends to God for his glory.
Yes, the nation Israel has fallen, and is the same as any other nation now.
That does not mean God has no special plan for this particular nation in the future.
This is overlooking what was revealed to Peter........
Acts 10:34-36 ~ Then Peter began to speak: "I now realize how true it is that God does not show favoritism but accepts from every nation the one who fears him and does what is right. This is the message of Good News for the people of Israel—that there is peace with God through Jesus Christ, who is Lord of all.
....and biblical apostate Israel (old covenant Israelites) are now gone....vanished from earth. There is no longer Sinai Judaism.That entire religious system was removed from this earth in 70 AD.
The modern geopolitical entity has nothing to do with what was written in the Scriptures.