Again, what has been said on this thread so far is an example of the use of the dialectic. The Thesis, which here is Revelation 18: 23 and Revelation 18: 4, has been stated. Revelation 18: 23 shows that Babylon is metaphoric for the church in apostasy, and Revelation 18: 4 calls those who belong to God out of Babylon, the apostate church.
The Christian Zionist Anti-thesis has not been stated here yet in an explicit way, though the preterist Anti-thesis has been stated, which is that the prophecies of Revelation were limited to a fulfillment in the First Century, and therefore Babylon in Revelation 17 and 18 is a metaphor limited to Judaism in the First Century.
Like Christian Zionism, which is a set of doctrines that can be seen as the Anti-thesis to the Thesis of the Gospel of Christ, preterism also imposes its own set of doctrines upon scripture, changing the doctrines partly through limiting prophecy to a First century fulfillment.
And in what is seen of preterism here the assumption seems to be that the Book of Revelation alone represents prophecy of an apostasy, a calling out of Babylon, though the remnant has not come up here yet.
II Thessalonians 2: 3-7, Luke 13: 20-21, I Timothy 4: 1-2, II Timothy 3: 1-8, II Timothy 3: 13, II Timothy 4: 3-4 and I Timothy 6:20-21 is a list of New Testament texts about an apostasy. Nothing from Revelation is listed here, though there prophecies in Revelation on an apostasy, in metaphoric language. It may be that the preterists say that all New Testament prophecy was fulfilled in the First Century, not just those in Revelation. But only Revelation was mentioned here so far.
But try to learn what the dialectic is, because it does not lead you to the Truth, but it is a procedure in an argument or quarrel. In fact, the Marxist version of the Hegelian dialectic was developed into an attitude and belief changing procedure in the 20th century.