Why does God take the Church out of the world?
God takes the Church out after the Church Age is completed and the Body of Christ is full, so He can pick up again with the Jew in particular during the final seven years. This resumes prophetic dealings that lead to the second coming and the Kingdom.
Les teaches that after the Church Age is completed and the Body of Christ is full, God has to take it out so He can pick up again with the Jew in particular during those final seven years, before the final thousand years of the Kingdom. This will be the second coming at the end of that seven years and the advent of the Kingdom. He also explains this fits the 7,000 years God laid out prophetically: 4,000 years to the Cross, about 2,000 years to our time, seven final years dealing specifically with the Jew, then the Kingdom, followed by another thousand years still in time, not yet eternity.