Sorry to disappoint.
Paul emphasized that the covenant made with Abraham extended beyond Israel as a nation and was inclusive of Gentiles (and exclusive of Israel as a nation).
You have to remember that Abraham was not an Israelite. It is important that God made this covenant not with Israel but with Abraham. Israel certainly had a role, but that does not negate God's covenant with Abraham.
We read in Isaiah that the Messiah will be "a Light unto the Gentiles, that You should be My salvation to the ends of the earth."
And in Isaiah 56 that God's house will be a house of prayer "for all nations".
God proclaims the Promise even in Genesis, stating that "all the families of the earth shall be blessed."
In Psalm 22 we read that "all the ends of the world shall remember and turn to the Lord, and all the families of the nations shall worship before You".
And, of course, in Isaiah 42 we alao read God say of the Messiah that He will be "a covenant to the people, as a light to the Gentiles".
I cannot ignore those passages because they are God's words (just as much as the passages you use). I do not see those passages as a contradiction to the passages you use at all, but they make me question your conclusions.
I quoted verses from the epistle to the Romans. It was written in 58 AD. All NT history from the resurrection of Jesus Christ through Acts 18 had passed when he wrote it. It was letter number 6 that he wrote, being preceded by Galatians, (49AD), 1 Thess (51AD) 2 Thess (51AD), 1 Cor (54 AD) and 2 Cor (55 AD).
Since the NT church of Jesus Christ is a mystery and it was not prophesied in the OT scriptures there must be an explanation for the covenant people of God, the Jews, because what was taking place in their day did not match any prophesies they could read about in their OT. So, I followed the logic and realize that the epistles of the NT is the document that explains what God is doing in this age that he calls in Matthew 13 "the mysteries of the kingdom of heaven" with his broad explanation in that chapter outlined in 7 parables from the beginning of the age with the sowing in the field and ending with the reaping of the harvest. This was a distinct transition and his beginning of hiding his truths in parables. Now, no one, no matter how many new Bibles we write or how many letters behind ones name or how many scholars are produced by the greatest of schools, we all must receive the doctrines of God the same way and it will take a bended knee.
Be patient while I help you to understand my point by quoting some Bible and then you can decide.
The unpardonable sin in Mt 12 and then the shift to the seaside in MT 13 for a new planting.
1 The same day went Jesus out of the house, and sat by the sea side.
2 And great multitudes were gathered together unto him, so that he went into a ship, and sat; and the whole multitude stood on the shore.
3 And he spake many things unto them in parables, saying, Behold, a sower went forth to sow;
The mature crop did not have enough laborers to harvest it.
Mt 9:38 Pray ye therefore the Lord of the harvest, that he will send forth labourers into his harvest.
I won't quote the parable of the Sower. You know it. This is near the completion of the ministry of Jesus and look at the reaction of his disciples that had ministered with him for 3 years.
10
And the disciples came, and said unto him, Why speakest thou unto them in parables?
11 He answered and said unto them,
Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
12 For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.
You need to understand what Jesus means here with this statement. He is taking the actual physical kingdom from this generation of rulers and officials of Israel because of unbelief and giving a different form of the kingdom to these men that had faithfully ministered with him. You need to get a hold of that. I suggest reading another parable that helps to understand this. It is in Luke 19:11-27 and was spoken 6 days before the Passover.
13 Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
14 And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:
15 For this people s (Israel's) heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
16 But blessed are your eyes, for they see: and your ears, for they hear.
The King has just been rejected at this point and the rulers are planning his death. There is no chance of the nation receiving him as King now. So, according to the parable in Luke 19 that I sent you to, Jesus goes back to the Father in heaven and will rule only those who these laborers convince to bow the knee to him even in his absence. This form of the kingdom will have no physical boundaries. The Father will at some point destroy those who will not bow to him and then he will keep all his promises of a physical kingdom when the Father sends him back to the earth. Those who entered his mystery form of the kingdom will rule and reign with him and occupy his throne corporately as a wife and the physical form of the kingdom will be inaugurated at the marriage supper of the Lamb after all his enemies are destroyed and there is perfect peace on the earth and the Abrahamic covenant will be realized in full.
Jesus said that his disciples could hear and see but look at what they did after he gave them the parable of the Wheat and tares.
Everything til now had been spoken to the multitude at the seashore. But now just Jesus and his disciple go into the house. They did not know the parable by just hearing it. They must have a divine teacher and a right heart and walk to learn the meaning.
36 Then Jesus sent the multitude away, and went into the house: and his disciples came unto him, saying, Declare unto us the parable of the tares of the field.
And he did.
Mark recorded him as saying this.
Mr 4:13 And he said unto them, Know ye not this parable? and how then will ye know all parables?
God must teach them to you from within. That is the message.
1 Cor 2:9 But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.
10 But God hath revealed [them] unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.
11 For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
12 Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God.
13 Which things also we speak, not in the words which man s wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned.
15 But he that is spiritual judgeth all things, yet he himself is judged of no man.
16 For who hath known the mind of the Lord, that he may instruct him? But we have the mind of Christ.
1Jo 2:27 But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him.
Some men do not understand the mysteries of the faith and cannot be taught.
Forgive me for not answering you post point by point.