What you said there would change and deny what Apostle Paul clearly said in Ephesians 2 to Gentiles having come into the covenants and promises to Israel, being made part of the "commonwealth of Israel".
Let's look at some of the details here:
Ephesians 2
11 Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
13 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us;
15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace;
16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby:
17 And came and preached peace to you which were afar off, and to them that were nigh.
18 For through him we both have access by one Spirit unto the Father.
19 Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God;
It used to be that Gentiles couldn't come to God because they weren't a part of Israel. The solution is not to make us part of Israel, as if there were the one man, 'Israel', and another man, 'Gentiles', and now in Christ 'Gentiles' becomes 'Israel'.
Now, those two men, Israel and Gentiles, are made into one New Man, which is neither Jew Nor Gentile, as in Christ are neither Jew nor Gentile. We've been reconciled to God, both Jew and Gentile alike, through the cross, and not through the covenants of which we had no part as gentiles.
So it's not about making us Israel, Jesus provided a new way to the Father, through Him, through the cross, by which Jew and Gentile both must be saved.
He's abolished the enmity by doing something completely different, that we all directly benefit from.
Much love!