IF you are in CHRIST JESUS then YOU are God's Chosen, YOU are Abraham's children and HEIRS to the promises! NOT unbelievers, including Jews! The nation of Israel is indeed God's, but most of the people there are NOT. God will defend the land itself but 95% of the Jews there are blinded reprobates who HATE Jesus Christ and Christendom with a vehement passion. YES... there IS a >>>REMNANT<<< of elect Jews who's eyes will be opened, drawn to Christ Jesus, and saved according to the election of grace (Romans 10 and 11)... but the vast majority are UNSAVED reprobates headed for hell for their unbelief and blasphemy of Christ Jesus. The Lord Jesus made it clear that HE is the ONLY WAY to the Father (John 14:6). John made it clear that ALL who deny the Son (Jesus Christ) are ANTI-CHRIST and the truth is NOT in them (1 John 2:22). Ethnic Jews are NOT "God's chosen people" today as they were in the Old Testament, ALL who are IN CHRIST JESUS are God's chosen and ONLY those who are in Christ Jesus are God's chosen (Galatians 3, Romans 2). As stated, yes, there is a REMNANT who will be saved at the time God has appointed to open their eyes just as Paul made clear in Romans 10/11, but only a remnant. ALL of the Old Testament promises and covenants to Israel WERE FULFILLED in CHRIST JESUS. God still has a plan for geographical Israel and SOME not-yet saved elect Jews, but simply being a Jew does NOT make them God's chosen or saved. Christ Jesus is the ONLY way to salvation and ALL who deny and regent Him will NOT enter God's Kingdom. Ultra-Zionist dispensationalist theology is false theology and has resulted in numerous heresies and false doctrines over the last several decades among Christians. The promise of Genesis 12:3 was to ABRAHAM alone, and it was fulfilled in Christ Jesus! We should preach the gospel to ALL people including and especially unbelieving Jews in hopes God would unblind and save them.
Shalom