I never said a Gentile becomes a Jew, but that the Gentile is grafted into the branch with Israel. As you said, your belief is the Dispensation view that the Church and Israel are not the same body of believers. This is only a view without the support of scripture. Romans 2:28, 29 is about the Jews in their disobedience to the law.
Israel lost her right to be called Gods chosen people, (God did save a faithful remnant), as they fell into idolatry worshiping other gods as they allowed themselves to fall from Gods grace as they followed the lust of their own hearts as they practiced Judaism, 1 Kings 9:1-9. God’s judgment against them led them to be captured, 605 – 537 B.C., by Nebuchadnezzar and taken into Babylon for seventy years while Nebuchadnezzar’s army killed many Jews in Judah and Jerusalem destroying the whole city of Jerusalem including the first Temple that was built through King Solomon’s reign in Jerusalem.
The second Temple was built under Ezra’s leadership and Israel continued practicing Judaism and their Temple was desecrated as part of an effort to impose Greek-oriented culture and customs on the entire population. Roman rule refurbished the temple as Herod, Romans vassal king, rules the land of Israel. In 70 A.D. the Temple is once again destroyed. The Temple Mount was taken over in 691 A.D. as the Arab nation built the Dome of the Rock and there has not been any other Temple built since that time on the original Temple Mount.
God gave Israel 490 years to repent. They were set free from Babylon when the Medes and Persian conquered Babylon (Chaldean) around 538 B.C. They were allowed back in the land and to rebuild the city of Jerusalem, however, they still did not repent for their sin of idol worshiping and they continued to receive punishment from God as the kingdom was taken away and eventually taken over by the Roman Empire. Malachi Chapter 1-4.
The 490 years were up and many of the Jews not only did not repent but they killed the very Messiah they had been waiting for as well as in 24 A.D. they made an opened display of rejecting the Gospel message as they stoned Stephen being the final messenger that was sent to give them their last chance to repent. The Jews were now rejected as God’s chosen people and were no different from the Gentiles as from that time forth each individual, Jew and Gentile has to make their own decision to accept or reject Jesus as Lord and Savior, John 3:3-7; Romans 10:9, 10.
The disciples were called first to preach to the Jews, Matthew 10:6, and Paul was called to preach to the Gentiles, Acts 22:21. God has saved a remnant out of the twelve tribes of Israel even up to a thousand generations that have always been faithful to Him, Exodus 20:1-6; Psalms 105:7, 8, but those who have yet to accept Jesus as Messiah God will continue to cut them off.
OK. Then we agree. When a Gentile becomes a Christian, he is part of the Church, not Israel.
What do you base this, 'Israel lost her right' on? Explain (Jer. 31:35-36). You may think Israel lost her right. God never said so.