This "island of holiness," blueprinted by the Lord, can be described by comparing it to the nucleus of an atom. Every atom is composed of a central nucleus surrounded by rings of electrons keeping the entire atom in a balanced state. If the nucleus of an atom is split, we have what is called "nuclear fission." If neutrons are added to the nucleus of an atom, we have "nuclear fusion."
The holy, attracting nucleus of Avraham's seed, would look and act like all atomic nuclei. This nucleus consists of an inner "core" (an inner being), represented by the Jewish people. Now, into this holy nucleus, individuals, as well as nations, all non-Jewish, who Rav Shaul (Paul) says are "aliens from the Commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world." (Ephesians 2:12), are either being propelled towards the holy nucleus or repulsed by it. Some are being fused into Avraham's seed, the nation of Israel, like the process of nuclear fusion. Others, like the process of nuclear fission, find themselves split off and propelled in the opposite direction away from the Jewish nucleus of holiness and away from the one true God. It is into this inner core or nucleus that those who were not born Jews would flow. Thus we have the origins of God's redemptive plan in Avraham and his seed.
It was thus to Avraham's seed, the nation of Israel that God gave this "Great Commission". This commissioned message was to attract from among the Gentiles a people for His name, the Name by which God revealed Himself to Israel.