Christians are grafted on the Jews?

Analyze together what Paul says here!
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 11v17
Darby and King James versions say "was grafted in MIDDLE or AMONG them" while, be grafted MIDDLE or AMONG does not mean "being grafted on them".
Some people interpret this biblical passage saying that Christians are grafted on the Israelites, but if we read the whole context of Romans 11, we will understand otherwise, for it is because there has been retrenchment of some, because of the incredulity, that the pagans have access to the truth and therefore, Gentiles were grafted in their place (the place of those who refused the gospel of Christ).
Paul begins well using the example of the lamentations of the prophet Elijah, in order to understand that God had reserved a remnant among the Israelites who are not turned to other gods and beliefs (see Rom 11v1-5).
God have grafted His Church that He redeemed, purified and into who He put His Holy Spirit, on people who rejected His Son Yeshua (Jesus)??? I SAY NO! (No man also seweth a piece of new cloth on an old garment: else the new piece that filled it up taketh away from the old, and the rent is made worse).
So, non-Israelite Christians owe nothing to the Jews (orthodoxe and messianic) who twist the scriptures to their advantage, the non-Israelites Christians are grafted on the good Olive Tree, who is Jesus Christ, the Lord Himself, and the root which supports pagans converted to Jesus Christ, is nothing nor no one other than the Lord Jesus Christ, as He says in the book of John 15v5-6: I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing. 6 If a man abide not in me, he is cast forth as a branch, and is withered; and men gather them, and cast them into the fire, and they are burned.
The Church of Yeshua (Jesus) is composed of people of all races and ethnicities who have been anointed by the Spirit of the Living God.
There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. Gal 3v28
Everything that Paul said to Gentile who converts, is do not glorify themselves at the expense of BRANCHES who has been entrenched, not despise them (verse 18).
This word also applies to all non-Israelites who convert to Judaism, they should not seek to replace the Israelites from every continent who have not yet entered the land of their ancestors, for God knows all the children Jacob and they are not identified by an religion.
NB: THE ROOT IS YESHUA (JESUS CHRIST) is not Israel, nor any other person, so, to say that Christians are grafted on the Israelites or Jews, is to take the place of God! repent, and do as the Bereans Jews (Israelites) , verifying what the people teach you, do not swallow any kind of doctrines, only the doctrine of Christ is the truth.
Shalom!
Esther Maiga