Who is the nation that replaced the nation of Israel as God's chosen people?

The spiritual nation of Israel not the nation of natural Israel. For centuries God dealt exclusively with natural Israel, time and again sending his prophets to the nation so that the people might turn from their wayward course. Finally he sent his Son, Christ Jesus, but the majority rejected him. Therefore, Jesus said to the unbelieving chief priests and Pharisees: “The kingdom of God will be taken from you and be given to a nation producing its fruits.”​—Mt 21:33-43.

The apostle Peter clearly identified that “nation” as one composed of persons who had accepted Christ Jesus. (1Pe 2:4-10) In fact, Peter applied to fellow Christians the very words that had been directed to natural Israel: “You are ‘a chosen race, a royal priesthood, a holy nation, a people for special possession.’”

A nation is not God's "chosen people". The descendants of Jacob (Israel) ARE God's inheritance and through the blood of Yeshua gentiles can be grafted into this inheritance. THAT is what the Bible says.

“TeeM”, many mature Christian believers acknowledge the “holy nation” spoken of in the Scriptures is not a kingdom or sovereign state identified by geopolitical boundaries and land measurements, rather it is the church, “the new creation” of the Son of GOD.  Through Jesus Christ, the present day operations of divinity among mankind may be understood as in a season of grace and reconciliation that is spirit in process and substance.  Mankind is not being challenged with mysteries and questions that require years of academic instruction and secular research.  Rather, humanity has been granted a revelation whereby otherwise invisible and unknown aspects of divinity are made accessible, alive, approachable, and indwelling.  Through the resurrection of Jesus Christ, mankind now may receive a fresh endowment of the same “life essence” (breath; spirit; word) that was imparted to Adam at Creation from the makeup of GOD.  Inseparable aspects of divine fullness are imparted that include balance, commitment, faith, forbearance, holiness, longsuffering, lovingkindness, oneness without sameness, personhood, wisdom, and wrath against sin.  As vessels of divine DNA (so to speak), believers are to exist and mature on the earth as the children and heirs of GOD until the appearing of Jesus Christ to harvest the earth.  Consider again the following that uses language from the New World Translation of the Holy Scriptures (Study Edition) [NWT]: 

(1.)  John 18:  33-37, NWT:  33 So Pilate entered the governor’s residence again and called Jesus and said to him: “Are you the King of the Jews?”+ 34 Jesus answered: “Are you asking this of your own originality, or did others tell you about me?” 35 Pilate replied: “I am not a Jew, am I? Your own nation and the chief priests handed you over to me. What did you do?” 36 Jesus answered:+ “My Kingdom is no part of this world.+ If my Kingdom were part of this world, my attendants would have fought that I should not be handed over to the Jews.+ But as it is, my Kingdom is not from this source.” 37 So Pilate said to him: “Well, then, are you a king?” Jesus answered: “You yourself are saying that I am a king.+ For this I have been born, and for this I have come into the world, that I should bear witness to the truth.+ Everyone who is on the side of the truth listens to my voice.”+ 

(2.)  Romans 10:  1-4, NWT:  10 Brothers, the goodwill of my heart and my supplication to God for them are indeed for their salvation.+ 2 For I bear them witness that they have a zeal for God,+ but not according to accurate knowledge. 3 For because of not knowing the righteousness of God+ but seeking to establish their own,+ they did not subject themselves to the righteousness of God.+ 4 For Christ is the end of the Law,+ so that everyone exercising faith may have righteousness.+ 

(3.)  Ephesians 2:  18-22, NWT:  18 because through him we, both peoples, have free access to the Father by one spirit.  19 So you are no longer strangers and foreigners,+  but you are fellow citizens+  of the holy ones and are members of the household of God,+ 20 and you have been built up on the foundation of the apostles and prophets,+ while Christ Jesus himself is the foundation cornerstone.+  21 In union with him the whole building, being harmoniously joined together,+  is growing into a holy temple for Jehovah.*  + 22 In union with him you too are being built up together into a place for God to inhabit by spirit.+ 

There is far more that should be said, correctly examined, and spiritually apprehended.  (For example, (4.)  John 18:  33-37, KJV:  33 Then Pilate entered into the judgment hall again, and called Jesus, and said unto him, Art thou the King of the Jews?  34 Jesus answered him, Sayest thou this thing of thyself, or did others tell it thee of me?  35 Pilate answered, Am I a Jew? Thine own nation and the chief priests have delivered thee unto me: what hast thou done?  36 Jesus answered, My kingdom is not of this world:  if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews:  but now is my kingdom not from hence.  37 Pilate therefore said unto him, Art thou a king then? Jesus answered, Thou sayest that I am a king. To this end was I born, and for this cause came I into the world, that I should bear witness unto the truth. Every one that is of the truth heareth my voice.)  Even so, I trust this fragment will be useful.  Be it unto you according to your faith. 

Citations from the NWT Translation of the Bible were downloaded 11:56 AM to 1:15 PM, March 16, 2020 from the Watchtower Online Library site @ https://wol.jw.org/en/wol/b/r1/lp-e/nwtsty/40/21#s...  New World Translation of the Holy Scriptures (Study Edition).  Copyright © 2020 Watch Tower Bible and Tract Society of Pennsylvania.  

THE BLACK PHOENIX 

Washington, DC

Notice the sequence: Mt. 21:43, Col. 1:13, 2 Pet. 1:11.

Jesus commanded His Apostles to "Go forth and make disciples of ALL peoples".

None. Israel has NOT been replaced. The invitation was extended to all Gentiles to enter in as well, but it WAS NOT displaced.

God announced his new chosen people for 2020 - it's the Jews again!

(Oh sh** say the Jews).

Spiritual Israel. 

BARJONA is the CHURCH/NATION Christ built on Simon Peter Barjona and Peter's descendants as was with Jacob and ISRAEL. Peter's DESCENDANTS are his successors, NOT the popes. All who are saved enters the Kingdom, not the Church. The Kingdom is more important.

GOD and CHRIST ordained Simon Peter Barjona, the last major Prophet. Simon Peter Barjona's DESCENDANTS are his successors, NOT the popes. The NATION/CHURCH, the Keys of Kingdom, and Peter's authority are with BARJONA(Simon Peter's seed) as was with Jacob and ISRAEL. If you're looking for today's prophet, look among Simon Peter Barjona's descendants.

The Church of Christ (and I don't mean the Mormons)