"What if some did not have faith? Will their lack of faith nullify God's faithfulness? Not at all!" (Romans 3:3, 4, NIV)
What a wonderful blessing it is to be included among the people of God! What an extraordinary, unbelievable privilege for people who were "nobodies" to become "somebodies."
In God's eyes, there have never been more than two kinds of people in the world Jews and Gentiles. If you were not a Jew (one of God's chosen) then you were a Gentile. But the good news is that God has torn down the "Berlin Wall" that separated Jews and Gentiles. Still, there remains two kinds of people today: those who bow their knee to God in Christ (whether Jew or Gentile) and those who don't.
God gave the Law of Moses to the Jews, but they couldn't keep it. Nobody ever could. And when many of the Jews rejected Jesus, God then opened the door to the Gentil...