Judas Iscariot was utterly replaced by Matthias.

Matthew 21: the utter replacement of one group with a different ethnic group to care for the vineyard.  It was European Man that took over the care of the vineyard and produced the fruits thereof by taking the Gospel to the entire world.  Those old false Jews (Talmud followers) were utterly replaced.

Only those born again into the blood-line of Jesus Christ are God's Chosen People.

The Church in Jesus Christ is Zion now and the Jerusalem of now. Paul always prayed for the peace of the church -- not a dusty city in the Middle East.

The mother and brothers and sisters of Jesus are those who do the will of the Father, not his half-siblings from Mary. 

Those baptized in Jesus Christ and confessing Jesus Christ are the Chosen People of God.  Hebrew 12:22