They say, "When the full number of Gentiles have come in (along with the full number of believing Jews, who are coming in at the same time), "the mystery of God shall be complete" and Jesus will return."
Let me explain. See, there's a Gentile alive now who will receive Christ, and then the church made up of Jews and Gentiles (not to be confused with Israel) will be raptured. This is the fullness of the Gentiles coming in. At this point, God's prophetic timeclock will start ticking again, and He will begin working with the Jews, who are different from the Jews He worked with when He was saving them during the church age.
Now, since all the Church, made up of both Jew and Gentile Christians (and not to be confused with Israel), will be gone from the planet, we don't know who will be witnessing to the Jews, much less the Gentiles (who God won't be working with) during the Tribulation. Somehow, they will get saved, because God will unharden their hearts after ensconsing most of them in Hell for the last 2,000 years.
Never confuse God's wonderful plan for Israel (not to be confused with His plan for Jews who receive Christ, during the church age).
These Jews who get saved during the Tribulation (Israel, not to be confused with the church) are not in the church, because the church made up of Jews (not to be confused with Israel) and Gentiles who make up the church, have already been raptured, so God could start working with the Jews (not the ones who were raptured, and thus not a part of Israel) again.
The Jews (not to be confused with raptured Jews) who get saved during the Tribulation witness to the Gentiles of the world. Lots get saved. They are not a part of the church (not to be confused with Israel) either. These are called Tribulation saints (not to be confused with the church, made up of Jews and Gentiles who got raptured, not to be confused with Israel).
So, in heaven, there will be the church, made up of Jews and Gentiles, not to be confused with Israel, and Israel, made up of Jews, who are not the Jews who got saved prior to the rapture and thus make up part of the church, which is not to be confused with Israel, and Tribulation saints, who are Gentiles who get saved when God's prophetic timeclock awakens Him to save the Jews, who are not part of the church, which is not to be confused with Israel, because Israel is made up of Jews only, not Gentiles, who could be a part of the church, or the Tribulation saints, depending on where God's prophetic timeclock is.
So, there's the church made up of Jews and Gentiles, then Israel made up of Jews only, then Tribulation saints, made up of Gentiles.
See how simple eschatology is when you don't confuse the church with Israel?
