Earthly Jerusalem is Babylon. It was the religious leaders of Jerusalem who conspired to kill the Son of God and afterward persecuted and killed the disciples of Jesus.
Revelation 11:8
And their dead bodies will lie in the street of the great city which is called spiritually Sodom and Egypt, where also their Lord was crucified.
Revelation 17:18
The [Harlot] woman whom you saw is the great city, which reigns over the kings of the earth.
Revelation 16:9
The great city was split into three parts, and the cities of the nations fell. Babylon the great was remembered before God, to give her the cup of the wine of His fierce wrath.
Revelation 17:18
The woman whom you saw is the great city which reigns over the kings of the earth.
Revelation 18:10-21
Woe, woe, the great city, Babylon, the mighty city! For in one hour your judgment has come.... Woe, woe, the great city, she who was clothed in fine linen and purple and scarlet, and adorned with gold and precious stones and pearls....What city is like the great city... Woe, woe, the great city, in which all who had ships at sea became rich by her wealth, for in one hour she has been laid waste!... So will Babylon, the great city, be thrown down with violence, and will not be found any longer.
Revelation 17:18
The [Harlot] woman whom you saw is the great city, which reigns over the kings of the earth.
Revelation 17:9
Here is the mind which has wisdom. The seven heads are seven hills on which the woman sits.
Luke 21:20
But when you see Jerusalem surrounded by armies, then recognize that her desolation is near.
Revelation 18:24
And in her was found the blood of prophets and of saints and of all who have been slain on the earth.
Revelation 11:8
And their dead bodies will lie in the street of the great city which is called spiritually Sodom and Egypt, where also their Lord was crucified.
1 Peter 5:13
She who is in Babylon, chosen together with you, sends you greetings.
Earthly Jerusalem is Babylon. It was the religious leaders of Jerusalem who conspired to kill the Son of God and afterward his disciples. She is apostate. Heavenly Jerusalem above is the city of God.
Galatians 4:26
Now this Hagar is Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children. But the Jerusalem above is free; she is our mother.
Hebrews 12:22
But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem.
Revelation 3
He who overcomes, I will make him a pillar in the temple of my God, and he will not go out from it anymore; and I will write on him the name of my God, and the name of the city of my God, the new Jerusalem, which comes down out of heaven from My God.
Revelation 21
And I saw the holy city, new Jerusalem, coming down out of heaven from God, made ready as a bride adorned for her husband.... And he carried me away in the Spirit to a great and high mountain, and showed me the holy city, Jerusalem, coming down out of heaven from God.