AF,
No, Rev 20 does not say Jerusalem gets destroyed. Please read the passage again.
They went up on the breadth of the earth and surrounded the camp of the saints and the beloved city. And fire came down from God out of heaven and devoured them.
See what happens directly after the fire from heaven, the last judgment and death is destroyed..
This is the last scene on material planet earth. After this event the universe heavens and the planet earth fly away from the "face" of Jesus in His glory.
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It is not only the armies that are destroyed, Jerusalem and the entire planet are destroyed by the fire and stone that strikes (Dan. 2).
The 2W's and the 7th trumpet give more details to the event described in Rev 20.
It is those surrounding the camp that get destroyed, not the "beloved city."
Well, there are several things taking place at this time.
1. The end of the mill/church/kingdom period on planet earth (the present).
The signs are the restoration of the people of Israel to Jerusalem, ending the times of the gentiles and the fullness of the gentiles, which is happening now.
The coming of the iron dragon beast nation out of the abyss. 1929 Vatican/Caesar/Antichrist returns to sit on the seat of the beast (Rome, iron nation Dan. 2, 4th beast nation Dan. 7., dragon Rev 12)
2. Jerusalem is surrounded by the armies of the gentile nations Magog.
This is an important clue to placing of this event in the prophetic time line. The attack on Jerusalem is only important because the people of Israel have been restored to the city, 1967. The city has been attacked many times since 70 ad., but it was not restored to Israel at those times.
The size of the armies is also shown at the 6th trumpet (200 mill., if you can accept it). The armies of Iran, Russia, Syria, and others are assembling now. Soon, Israel will stand alone and our enemies will attack. The whole planet will see Israel die. Then the fire.
3. The #2 resurrection, 7th/last trumpet, coming for the kingdom/church, the coming for salvation. (There are only 2 resurrections, 1 Cor 15:23-28, 23-24, Jesus and the OT saints and those who are His at His coming.)
From this small passage we can't tell if it is the Jerusalem we see today or if it's another beloved city. Nowhere in the Bible is Jerusalem called, "beloved." However, saints are frequently called "beloved" in the NT. Perhaps its the church which gets surrounded. We simply do not know.
It is the people of Israel restored in the city that make it beloved.
Time to decide if this is the present Jerusalem or not. If it is the present Jerusalem............then the #2 resurrection is about to happen, then it is the end.
I agree whatever is happening in this passage happens after the millennium is over. Thus the "millennium" which is really the "thousand years" begins at the Cross or Pentecost, transitions for 40 years, then the millennium is in full swing from 70 AD and through today. Then this crazy event of Rev 20 happens and presumably a new age will begin after that.
The new age after the fire is the eternal age after all life on planet earth has ended, heaven and planet earth have flown away, the last judgment has taken place, and death (separation) is ended.
This planet and universe will never be seen again. We are to live in the heart of God with Jesus, surrounded by His love.