We read in Hebrews 11 of Jews who had faith.
Not all Israel had faith. But, like Isaiah, these Hebrews 11 Jews trusted in a coming Messiah even though they did not know his name would be Jesus. This was enough.
One must have faith in the righteousness provided by God to be saved. It's an individual thing. Not all individuals of any nation or tribe will be saved just because of blood heritage.
Most accurate post yet. God is Savior of one people...a Bride for His Son. Christ is not a polygamist. The Bride of Christ’s redemption started with the promise of Gen 3:15 and all those who put their faith in that promise.
But I do believe that God holds a special place in His heart for the nation that He chose to reveal Himself to the world through. According to Romans, salvation was offered to the Gentiles in part to make the nation of Israel jealous. God will turn His attention back to them when the time is right...adding more to the True Bride of Christ.