He's just misunderstanding. When the rapture occurs there will be a fake alien invasion.
It won't be fake. All the stars will come to earth as God's angels. Satan will deceive people into thinking all the angels are aliens, because the entertainment industry has been conditioning people since 1948.
Instead of body snatchers, the angels will be removing souls out of Adam's dead corruptible flesh. God's angels have always appeared as men. Not aliens taking over human bodies.
Jesus comes to the Mount of Olives at the 6th Seal. He brings all the angels from the firmament with Him. These verses are not symbolic:
"The enemy that sowed them is the devil; the harvest is the end of the world; and the reapers are the angels."
"And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other."
"And then shall he send his angels, and shall gather together his elect from the four winds, from the uttermost part of the earth to the uttermost part of heaven."
"When the Son of man shall come in his glory, and all the holy angels with him, then shall he sit upon the throne of his glory:"
When it says all, it means all.
"And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind."
This is symbolism for the angels coming to earth at the Second Coming.
The angels round up the entire church at this event to meet the Lord in the air, but then all the angels come to earth with Jesus, and the church remains in Paradise. No where in these verses do the saints come yet. They have to wait until all the harvest is gathered, up until the battle of Armageddon which is the last harvest of the dead with the mark of the beast.
"And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled."
All the harvest of the Trumpets and Thunders has to happen after the Church is glorified. The AoD has to happen after the Thunders, not before the 5th and 6th Seal. Revelation is the correct chronological order of this final harvest. The angels are on earth during the Trumpets and Thunders before the 7th Trumpet even sounds. It is in the midst of the days of the 7th Trumpet that the third woe happens. Satan may get to set up the AoD then, but certainly not prior to the 7th Trumpet.