Why will the Church not go through the Tribulation?
The Church will not go through the Tribulation because God cannot mix Law and Grace. When the Tribulation begins, Israel returns under Law, so the Church must be removed out of the way. Romans 11:25 confirms that when the fullness of the Gentiles is complete, God takes the Body of Christ out and resumes dealing with Israel.
Les explains that God's premise still stands: you cannot mix Law and Grace from the front end, and you cannot mix Grace and Law on the tail end. Because the Tribulation begins with Israel back under the Law, the Church has to get out of the way. He says this is probably his best argument that the Church will not go into the Tribulation—we have to be out. He also points to Romans 11:25, where the fullness of the Gentiles is brought in and God turns again to the nation of Israel. When the Body of Christ is complete and the last Gentile is saved, God takes it out and picks up where He left off with Israel.