Babylon represents a phase of Babylon that not only includes traditional pagans but now Apostate Christendom or Apostate churches. Rght now even a portion of the Protestant denominations that came out of the Reformation have become Apostate like the Church of England. That's why angel says "Come out of her...." basically if you are in a church that becomes Apostate you should leave the church. These Apostate churches are involved in Antichrist spiritual commerce specifically they are "selling" an Apostate gospel that people are "buying". In addition given the Book of Revelation contains many dualities it cannot be ruled out that Babylon actually represents the literal ancient city of Babylon will be rebuilt to be destroyed again in the Book of Revelation because it says "the city is spiritually like Sodom and Egypt" so then city could be viewed as literal Babylon because it does not make sense to say a spiritual city is spiritually like other spiritual cities.
Nah... the 'come out of her' Babylon idea is NOT APPLICABLE yet today.
The mystery Babylon of Revelation is about the city of JERUSALEM fallen into IDOL WORSHIP when the coming pseudo-Christ ends the orthodox Jew's animal sacrifices there, and he instead places the "abomination of desolation" idol that Lord Jesus warned us about for the end, in His Olivet discourse.
I know some find it difficult to believe that event is going to happen in future JERUSALEM, but that is what the Scriptures are actually pointing to for the end about the Babylon Harlot. The last verse of Rev.17 even tells us that Babylon Harlot is a "great city", just as Rev.11:8 does also!
So the Jew's FALSE DOCTRINE of trying to cast the devil's shadow even over apostate churches by the idea of the Revelation Babylon, including PROTESTANT CHURCHES if you'll notice brethren, which is what jcentricity also included, is nothing but a charade.
There will be deceived Christian brethren that will believe the false Jew's theories and will fall away with them to bow to that pseudo-Christ that comes first. But it won't happen with those in Christ that listen to His warnings and His Apostle's warnings about the end of this world.
1. There will... be a 3rd Jewish temple built in JERUSALEM for the coming "great tribulation".
2. The orthodox unbelieving Jews in JERUSALEM will startup old covenant animal sacrifices again once that new 3rd temple is built for the end. It maybe that the coming pseudo-Messiah (Antichrist) will be here to help initiate that building, as the orthodox Jews today are still... waiting for the Messiah of The Bible to come.
3. That pseudo-Christ that will come first, after the first 1260 day period of Daniel's 70th "one week" of Dan.9:27, will in the middle end... those Jew's sacrifices in JERUSALEM, and instead place the "abomination that maketh desolate" in that 3rd temple, which Jesus quoted from the Book of Daniel in giving His Signs of the end.
4. That pseudo-Christ, or false-Messiah, or Antichrist, or "man of sin", or "that Wicked", or that "another beast", or "dragon", will then demand that ALL the world bow in worship to him as God, or to be killed. In this respect, that event will be a repeat of events much like what Nebuchadnezzar, king of historical Babylon did when setting up a gold image of himself, and demanding all bow in worship to it or be killed. (See end of Revelation 13 about the "image of the beast").
5. Towards the latter half of Daniel's "one week" of the "great tribulation", that is when the delivering up of some of Christ's elect will happen, for them to give a TESTIMONY by The Holy Spirit against the beast (Mark 13).
6. On the 7th Trumpet, the "last trump" of Apostle Paul, that is when Jesus will come with His great army, and the "day of the Lord" events will take place...
a. God's consuming fire burns man's works off this earth, and changes all to the time of the world to come ending this flesh world.
b. Christ's faithful still alive on earth are "caught up" to Him and to the asleep saints He brings with Him.
c. Some of the wicked are suddenly destroyed on earth. The wicked dead are raised on that day also.
d. Jesus with all His faithful Church go to JERUSALEM on earth, to the Mount of Olives, and begin His "thousand years" reign over all nations per Rev.20.
e. Christ's Millennial temple is created on earth where Jesus and His elect Church will reign from, and where God's River will return then along with the tree of life on the sides of that River.
f. Only Christ's faithful Church will be allowed access thru the gates of the beloved city then, and have access to the tree of life. The wicked's place will be outside the gates of the beloved city, in the "outer darkness" where there will be wailing and gnashing of teeth showing their shame for having rejected Jesus Christ.