Evidently you have failed to study the matter. So here is the Scripture separating the Church from redeemed and restored Israel.
ROMANS 11: REDEEMED AND RESTORED ISRAEL
ISRAEL AND THE CHURCH ARE SEPARATE
25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in. [Note: the Church has become primarily a Gentile Church during the Church Age, while unbelieving Israel is spiritually blind. Following the Rapture, God will resume His dealings with Israel]
ALL (BELIEVING) ISRAEL SHALL BE SAVED
26 And so all Israel shall be saved... [Note: only those who repent and believe in the Lord Jesus Christ at His Second Coming are saved out of Israel. Apparently one-third of the Jews at that time]
CHRIST IS THE DELIVERER WHO WILL DELIVER ISRAEL FROM ITS ENEMIES AS WELL AS FROM SIN AND WICKEDNESS
...as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob... 27 For this is my covenant unto them, when I shall take away their sins.
ISRAEL IS BELOVED BECAUSE OF ABRAHAM, ISAAC, AND JACOB ("THE FATHERS")
28 As concerning the Gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes. [Note: "the election" means the redeemed elect (saved) of Israel after the Second Coming]
GOD HAS NOT CHANGED HIS MIND OR HIS COVENANT
29 For the gifts and calling of God are without repentance.
THE UNBELIEF OF ISRAEL RESULTED IN THE SALVATION OF GENTILES
30 For as ye in times past have not believed God, yet have now obtained mercy through their unbelief:
THEREFORE ISRAEL IN THE FUTURE WILL ALSO OBTAIN MERCY
31 Even so have these also now not believed, that through your mercy they also may obtain mercy.
GOD WILL HAVE MERCY ON ALL
32 For God hath concluded them all in unbelief, that he might have mercy upon all.
NO ONE CAN FATHOM THE UNSEARCHABLE WAYS OF GOD
33 O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out! 34 For who hath known the mind of the Lord? or who hath been his counsellor? 35 Or who hath first given to him, and it shall be recompensed unto him again?
TO GOD BELONGS ALL THE GLORY
36 For of him, and through him, and to him, are all things: to whom be glory for ever. Amen.
Obviously this will all come as a shock to you. But now you have two clear choices: (1) believe God and abandon all your FALSE theology or (2) cling to your false theology and ignore what God says (to your own peril).