No, it is very clearly you. Hence you have to constantly throw out his teachings, as you do Christ's, whenever they don't agree with you. Nor can you substantiate your claims. You say there are multiple gospels for different people, yet Paul says there is one. You say we aren't part of Israel - Paul says we are, and that we share in their blessings. You say our works are irrelevant to salvation - Paul says we are judged by our deeds, and that those who pursue what is good and righteous shall be rewarded with eternal life. etc.
More to the point - if Paul believed that the Gospel of Christ, the Gospel of the Son, the Gospel of the Kingdom, the Gospel of God, etc. were all different - he surely would have spent some time differentiating them from one another. But he didn't. And if that were what he taught, then if he didn't write of it then surely someone else in the early church would have written of it. Once again, the Church Fathers wrote nothing about how these were different gospels. So there is nothing to substantiate your position, and everything to contradict it.
You have invented these divisions out of thin air - and for the purpose of cherry-picking the scriptures to your liking.
2 Timothy 4:3 For the time will come when people will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear.
First off, when a gentile joined Israel - he become part of Israel and was no longer a gentile. Thus, even before Paul, there was no division between jew and gentile
IN CHRIST.
Secondly, by recognizing that people could always join Israel, you lose your talking point about how the Gospel of the Kingdom is supposedly different from all the other "Gospel Of X" references in scripture (none of which you have expounded upon).
Thirdly, while there maybe some future components to the prophecy of the New Covenant, the New Covenant is already in effect.
1 Corinthians 11:25 In the same way, after supper he took the cup, saying, “This cup is the new covenant in my blood; do this, whenever you drink it, in remembrance of me.”
2 Corinthians 3:6 He has made us competent as ministers of a new covenant—not of the letter but of the Spirit; for the letter kills, but the Spirit gives life.
Hebrews 9:15 For this reason Christ is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance—now that he has died as a ransom to set them free from the sins committed under the first covenant.
Hebrews 8:1-6 Now the main point of what we are saying is this: We do have such a high priest, who sat down at the right hand of the throne of the Majesty in heaven, 2 and who serves in the sanctuary, the true tabernacle set up by the Lord, not by a mere human being. 3 Every high priest is appointed to offer both gifts and sacrifices, and so it was necessary for this one also to have something to offer. 4 If he were on earth, he would not be a priest, for there are already priests who offer the gifts prescribed by the law. 5 They serve at a sanctuary that is a copy and shadow of what is in heaven. This is why Moses was warned when he was about to build the tabernacle: “See to it that you make everything according to the pattern shown you on the mountain.”[a] 6 But in fact the ministry Jesus has received is as superior to theirs as the covenant of which he is mediator is superior to the old one, since the new covenant is established on better promises.
Hebrews 9:11-15 But when Christ came as high priest of the good things that are now already here,[a] he went through the greater and more perfect tabernacle that is not made with human hands, that is to say, is not a part of this creation. 12 He did not enter by means of the blood of goats and calves; but he entered the Most Holy Place once for all by his own blood, thus obtaining eternal redemption. 13 The blood of goats and bulls and the ashes of a heifer sprinkled on those who are ceremonially unclean sanctify them so that they are outwardly clean. 14 How much more, then, will the blood of Christ, who through the eternal Spirit offered himself unblemished to God, cleanse our consciences from acts that lead to death,[c] so that we may serve the living God! 15 For this reason Christ is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance—now that he has died as a ransom to set them free from the sins committed under the first covenant.
You say the New Covenant is future, Paul declares that he is a minister of the New Covenant. The New Covenant is already in effect, Christ has already entered the Most Holy Place and serves as High Priest of this New Covenant.
He did go to Israel first, but that was only in the beginning. It was never the intention that his gospel remain only with Israel - hence he subsequently instructed them to go to all nations.
Matthew 28:16-20 Then the eleven disciples went to Galilee, to the mountain where Jesus had told them to go. 17 When they saw him, they worshiped him; but some doubted. 18 Then Jesus came to them and said, “All authority in heaven and on earth has been given to me. 19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.”
Come on now, the Great Commission, the New Covenant, this is basic stuff.