They will if they hear and believe the gospel of our Lord Jesus. You think so called end time prophecies of Israel turning to God are future, but they speak of Christs earthly ministry and the days of the Apostles onward.
You are completely ignoring Pauls teaching that the promises were made to a man of great faith, Abraham, and to his son, Jesus Christ. You don't see the heartache Paul had for his kinsmen according to the flesh, because they thought they were the chosen people of God, but were dying in their sins.
He said it to unbelieving Jews in other places, but why bother directing you to them? Concerning the forsaken, it's always because people forsook God first, but it's obvious those who fell in the wilderness were ultimately forsaken by God, because you can't inherit a land you're never going to enter.
Bs. Jesus said that in the temple to Jewish people, probably the priests.