Abraham continues to bear fruit and by the spirit of adoption has inherited Christian gentiles as well a few Christian Jews. There will be more Jews joining us as foretold by Paul in Hebrews, they’ll be “grafted back in”. Israel will stand until the final judgment and perhaps beyond in the form of the redeemed. Israel is God’s anvil upon which he’ll beat the spirituality of Humanity into the image of his son Jesus Christ!
when Paul says “all Israel will be saved”, is he speaking of the Body of Christ, the Church or is he speaking of every person with Jewish DNA?
Gentile means one that is not of the Covenant, not of the Promise. You might want to do a bit of studying.