I have read Romans 11, numerous times. I have read the OT prophets numerous times. It's why I am Seventh-day Adventist, and no longer Roman Catholic.
The theology you presently espouse is Jesuit theology. Go read their material. You'll see.
I understand your reluctance to read the evidence I provided. It would show your error, quite plainly, and you do not want that. Easier for you to ignore it. I get it, really. When truth comes to us, we have two choices. Right now, you are making the choice Pilate took. You don't have to make that choice, but you are making it none the less.
Romans 11:
Rom 11:1 I say then, Hath God cast away his people? God forbid. For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.
Rom 11:2 God hath not cast away his people which he foreknew. Wot ye not what the scripture saith of Elias? how he maketh intercession to God against Israel, saying,
Rom 11:3 Lord, they have killed thy prophets, and digged down thine altars; and I am left alone, and they seek my life.
Rom 11:4 But what saith the answer of God unto him?
I have reserved to myself seven thousand men, who have not bowed the knee to the image of Baal.
Rom 11:5 Even so then
at this present time also there is a remnant according to the election of grace.
Rom 11:6 And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work.
Rom 11:7 What then?
Israel hath not obtained that which he seeketh for;
but the election hath obtained it, and
the rest were blinded
Rom 11:8 (According as it is written,
God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day.
Rom 11:9
And David saith, Let their table be made a snare, and a trap, and a stumblingblock, and a recompence unto them:
Rom 11:10
Let their eyes be darkened, that they may not see, and bow down their back alway.
Rom 11:11 I say then, Have they stumbled that they should fall? God forbid: but
rather through their fall salvation is come unto the Gentiles, for to provoke them to jealousy.
Rom 11:12 Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness?
Rom 11:13 For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:
Rom 11:14 If by any means
I may provoke to emulation them which are my flesh, and
might save some of them.
Rom 11:15 For if the
casting away of them be the reconciling of the world, what shall the receiving of them be, but life
from the dead?
Rom 11:16 For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.
Rom 11:17 And if
some of the branches be broken off, and thou, being a wild olive tree, wert graffed in among them, and with them partakest of the root and fatness of the olive tree;
Rom 11:18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.
Rom 11:19 Thou wilt say then,
The branches were broken off, that I might be graffed in.
Rom 11:20 Well;
because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:
Rom 11:21 For if
God spared not the natural branches, take heed lest he also spare not thee.
Rom 11:22 Behold therefore the goodness and
severity of God: on
them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou
also shalt be cut off.
Rom 11:23 And
they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.
Rom 11:24 For if thou wert cut out of the olive tree which is wild by nature, and wert graffed contrary to nature into
a good olive tree: how much more shall these, which be the natural branches, be graffed into their own olive tree?
Jesus (Israel of God, the Alpha and Omega) is the good (God alone is good) Tree to which the Remnant (of Israel of the flesh) continued in as original branches (like Peter, James, John, Paul, Nicodemus, Joseph of Armiathaea, etc) and into whom the Gentiles (Cornelius, Ethiopian Eunuch, etc) were graffed in. Israel (after the flesh) as a nation (like the Sanhedrin), can inherit nothing, except it be through Jesus Christ. Individuals (like Joseph of Arimathaea and Nicodemus had) can still be delivered in Christ Jesus through Faith in Him.
2Co_1:20 For all the promises of God in him are yea, and in him Amen, unto the glory of God by us.
Rom 11:25 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.
Rom 11:26 And so all Israel shall be saved: as it is written,
There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
Rom 11:27 For
this is my covenant unto them, when I shall take away their sins.
Rom 11:28 As concerning
the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes.
Rom 11:29 For
the gifts and calling of God are without repentance.
Rom 11:30 For as ye in times past have not believed God, yet have now obtained mercy through their unbelief:
Rom 11:31 Even so have
these also now not believed, that through your mercy they also
may obtain mercy.
Rom 11:32 For
God hath concluded them all in unbelief, that he might have mercy upon all.
Rom 11:33 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!
Rom 11:34 For who hath known the mind of the Lord? or who hath been his counsellor?
Rom 11:35 Or who hath first given to him, and it shall be recompensed unto him again?
Rom 11:36 For of him, and through him, and to him, are all things: to whom be glory for ever. Amen.
The individuals are called to come into Christ Jesus through faith. If they do not, they are forever lost.
Read it - each verse. If you do not, you have chosen to remain as blind as they of old, and the prophecy of David and Isaiah are for you.
1 Corinthians 10 and 1 Corinthians 15:44-46:
Jesus is Israel (Matthew 2:13-15,19-21; Hosea 11:1; his children are his disciples (they overcome with Him (1 John 2:13-14; Revelation 3:12, 12:11)); Hebrews 2:13; Isaiah 8:16,18; John 13:33), the true "overcomer" (John 16:33; Revelation 3:21), the real "Prince" with God (Isaiah 9:6; Daniel 8:11,25, 9:25, 10:13,21, 11:22, 12:1; Acts 3:15, 5:31; Revelation 1:5), being Lord over His own house, whose house are we (Psalms 98:3; Hebrews 3:6; Jeremiah 31:33), who himself is the "elect" (Isaiah 42:1; Matthew 12:18; 1 Peter 2:6) of the Father, in whom all the promises of God find their realization (2 Corinthians 1:20). The promises made by God were all based upon condition (Exodus 19).
Mat 2:13-15,19-21; Hos 11:1; Jer 31:33; Rom 9:6-8; Heb 2:13; Isa 8:16,18; Jhn 13:33, 16:33, 17:12, 18:9, 21:5; 1 Cor 15:46; 2 Cor 1:20; Gal 6:16; Heb 3:6, 8:8,10; Rev 3:21
'Israel' after the flesh, as a 'nation', is left desolate (Matthew 23:38; Luke 13:35), to bear no more fruit ever again (Matthew 21:19), cursed, withered away (Mark 11:21), dried up from the roots (Mark 11:20), "twice dead" (Jude 1:12), and the axe already laid at their root (Matthew 3:10; Luke 3:9), cut down and to be thrown into the fire.
Rom_9:6 Not as though the word of God hath taken none effect. For
they are not all Israel, which are
of Israel:
When Paul in Romans says "And so all Israel shall be saved", in the context it means that all those who are in Christ Jesus (the elect of God, the good Tree, the real Israel of God), shall be saved. Anyone knowingly choosing to remain outside of Him is lost.