By the time Christ comes to translate the living and resurrect the dead do you suppose it will amount to thousands or millions of the living?
The idea is that there will be millions of living persons who will suddenly disappear. I think, by that time, there will only be a few.
The church is the first to be removed. I am not sure that is all 2.6 billion people who claim to be "Christians".
The dead are all resurrected. Mark 12:24-27
"And Jesus answering said unto them, Do ye not therefore err, because ye know not the scriptures, neither the power of God? For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as the angels which are in heaven. And as touching the dead, that they rise: have ye not read in the book of Moses, how in the bush God spake unto him, saying, I am the God of Abraham, and the God of Isaac, and the God of Jacob? He is not the God of the dead, but the God of the living: ye therefore do greatly err."
Jesus points this out prior to His own death and resurrection. Jesus never states a future single resurrection. Jesus just comments on when they are resurrected.
We know the whole OT assembly (the redeemed church) were resurrected at the Cross and permanently left death when Jesus ascended to the Father on Sunday morning. There have been no dead in Christ since the Cross. Even though Paul still refers to them as the physically dead, which is true, they were not physically dead post the Cross. They are the living in Paradise. They will all arise from Paradise and that is who the Lord brings with Him. But all in Christ since the Cross, never even tasted death, nor were bound by death. They entered Paradise alive into God's permanent incorruptible physical body. 2 Corinthians 5:1.
God is not the God of the dead, but of the living. The first resurrection has been an ongoing phenomenon since the Cross. The first resurrection is the physical resurrection of all in Christ. Even Lazarus was given the first resurrection. He was not beheaded, but still part of what is the first resurrection, physical.