Rom 2:28 For he is not a Jew who [is one] outwardly, nor [is] circumcision that which [is] outward in the flesh; 29 but [he is] a Jew who [is one] inwardly; and circumcision [is that] of the heart, in the Spirit, not in the letter; whose praise not from men but from God.
Straight and to the point. A Jew is only defined by his inward status, and not his physical status. It is true that there were once Jews based on Tribal descent. But those days have long since vanished. Now days, and for the last several hundred years, to a thousand years, there is no such thing is a biological Jew from a Biblical perspective (Old and New Testament); they just don't exist. Now there are modern day Jews defined by geographical birth. However, there's a difference between modern day Jews by geographical birth, vs Jews by Tribe...A HUGE difference. Modern day biological Jews are not biblical; hence, the only thing they carry is a name, but not a biblical name.
Israel is more than just a race; it is more than just a nation; it is the people of God, from faith, by faith, and only faith. Those who assemble in the name of Christ Jesus, embrance Israel because they are Israel