For some strange reason, you skipped over "the time of the judgment of the dead" in Revelation 11:18, where we find reward for some and destruction for others. This is the time of the event found in John 5:27-30.
What you most likely do not realize is that because Christ returns in Revelation 16:15-16, and also in chapter 19, the Book of Revelation cannot be in chronological order. Instead, it is a series of overlapping visions given to John on the Island of Patmos.
In 2 Thessalonians 2:7-10, Paul describes Christ returning "in flaming fire", taking vengeance on those who do not know God. When does the fire come in Revelation chapter 20?
How many mortals are found at the end of Matthew 25:31-46?
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Wrong. If anything, you skipped the keyword "dead". It says "at the time of the judgement of the
dead". The first judgement is for the living and the dead righteous, which Jesus presides over. Because some Christians will be raptured alive together with others who resurrect from the dead.
2 Timothy 4:1,
In the presence of God and of Christ Jesus, who will judge
the living and the dead, and in view of his appearing and his kingdom, I give you this charge...(NIV)
However the judgement of Revelation 11 is stated clearly to be for the dead.
Revelation 11:18,
And the nations were angry, and thy wrath is come,
and the time of the dead, that they should be judged, and that thou shouldest give reward unto thy servants the prophets, and to the saints, and them that fear thy name, small and great; and shouldest destroy them which destroy the earth. (KJV)
This is in line with Revelation 20:11-15,
And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them. And I saw the
dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life:
and the dead were judged out of those things which were written in the books, according to their works. And the sea gave up the
dead which were in it; and death and hell delivered up the
dead which were in them: and they were judged every man according to their works. And death and hell were cast into the lake of fire.
This is the second death. And whosoever was not found written in the book of life was cast into the lake of fire. (KJV)
This is because at the time of the great white throne judgement all nations of unbelievers (Gog and Magog) are dead, having been destroyed by fire from heaven after they attempted to attack Zion.
Revelation 20:7-9,
And when the thousand years are expired, Satan shall be loosed out of his prison, And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea. And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them. (KJV)
Context is key. Understand that Revelation 11:18 starts speaking from the perspective of God, first on the subject of unbelievers. What it specifically states "has come" is the wrath. Which is the destruction Jesus brings on the gentile world and it's government at His second coming. It then goes on to say their judgement (great white throne) is at hand but makes it seem closer because it's speaking from the perspective of God. Understand that to us, the day of the Lord is simply the day Jesus returns. But to God, the day of the Lord is the day Jesus returns as well as the entire one thousand years which follow because to God,
...a day is like a thousand years, and a thousand years are like a day. 2 Peter 3:8 (NIV)
So while we see the great white throne judgement as being a thousand years away from the coming of Christ, God sees the judgement as having arrived already. So he says their wrath and judgement is at hand. Then He speaks on the subject of the righteous, saying their reward has come. Hence the context in Revelation 11:18.
And I don't know what exactly you're reading into 2 Thessalonians 2:7-10, but the fire being described there is fire from the breath of Jesus' mouth, also known as the "sword of His mouth" with which He destroys the world government headed by the antichrist and the false prophet, at His return.
2 Thessalonians 2:8,
And then the lawless one will be revealed, whom the Lord Jesus will overthrow with the
breath of his mouth and destroy by the splendor of his coming. (NIV)
In line with Revelation 19:14-15,
The armies of heaven were following him, riding on white horses and dressed in fine linen, white and clean.
Coming out of his mouth is a sharp sword with which to strike down the nations. “He will rule them with an iron scepter.” He treads the winepress of the fury of the
wrath of God Almighty.(NIV)
I also don't understand what you're getting at with Matthew 25.
It also describes the second coming of Jesus and how the righteous will be gathered away from the unbelievers. Verse 46 says about the unbelievers:"they will go away to eternal punishment", meaning they will go away
destined for eternal punishment. It says "they will go away", not "they will be taken away". That tells you they're not being cast into the lake of fire just yet.