Actually I think a strong case could be made for 3 people groups?   1 Corinthians 10:32 "Give no offense to the Jew, to the Greek (Gentile) or to the Church of God or a better Pauline way of saying it to the Body of Christ. One can be a Jew and come to Christ and he is a New Creation. One can be a Gentile during this dispensation and come to Christ and he is a New Creation. What happens after the Catching Away? The Body of Christ is Removed, and you have an Unbelieving Gentile World that says let's destroy the Jews and take Jerusalem. So after the catching away there will be 2 people groups left. Why did Jesus in his earthly ministry only have dealings in scripture with 2 Gentiles? Two and 1/2 if you count the woman at the well who was half Jewish. Why did he tell his disciples not to go to the Gentiles? Jesus, John the Baptist and the Disciples ( they had a vested interest because they will sit on thrones during the kingdom) proclaimed the Gospel of the Kingdom because the King was in their midst. What do you have to have for a Kingdom, a King. When they rejected their King, the Nation of Israel was set aside during this Dispensation. The Risen Savior stopped Saul on the road to Damascus to proclaim what Paul would eventually call "My Gospel"and during this dispensation it is open to Jew and Gentile alike. The Gospel of Grace 1 Corinthians 15:1-4  What happens after the catching away? The Jews (the nation of Israel) finishes her last 7 years of the 490 year curse. Israel is being prepared to become the Head of the Nations during the Tribulation. What is proclaimed during this period? The King is Coming, and the Kingdom is being made ready.    God Bess, Jimmy