Who is a “Jew” according to Scripture In Zech 8:23 ?

This was written in Sep 2013. We are adding these writings from our old web site. (www.old.gentileassembly.org ) GOD prophesied, in the end time, people will hold on to the garment of a ‘Jew’ and say ‘we have heard that GOD is with you’ (Zech8)and will come after them. But Jews were there all these years. Then why in this end time people come after these Jews? Who are they? Why are they called a ‘Jew’? We all must know because GOD IS WITH THEM. The book of Hebrews is written to them. What makes one a ‘Jew’? JESUS CHRIST THE LORD is a ‘Jew’. Then, HIS true children also will be Jews. When we say ‘Jews’, this writing applies to all the churches of GOD which say they are Jews (were started by HWA and now by GF and not about the Jewish race). This applies to the SPIRITUAL Jews in the Phil. Church of GOD and other sister churches. The Jews are Abraham’s children. Then who ever has the works of Abraham, must be called the Jews. He fathered both Israel and Gentiles through Hagar and Sarah. So either Jew or Greek, could be Jews in the end, having the works of Abraham! Scripture says, unless the Jews keep the law, their circumcision is made nothing and one must worship GOD in SPIRIT and Truth. CHRIST also said, the Jews will not worship GOD in SPIRIT and Truth.(joh 4). Then again He said, some will worship in SPIRIT and Truth. Why did CHRIST tell to worship GOD in SPIRIT and truth? They become the Jews, SPIRITUALLY.