That's from the Book of Revelations, which is probably talking about Nero Caesar anyway.
One should read the Apocalypse of John/revelation and be amazed by the imagery and strangeness that is conjured up, as well as it's highly vengeful nature. Another great way to read it is with a word in mind hupopodion/ὑποπόδιον, and to think of this as god putting the world under his feed and conquering the world and look at it's accordance in Hebrews.
It’s “Book of Revelation”. Singular. Probably because it talks about Jesus being revealed to the whole world. He will be revealed once and for all, so singular.
Regarding Revelation being behind us. It will be as clear as thunder visible from the east to the west and many cities will be destroyed etc what didn’t happen yet I’m sure. Bible warned that people will try to convince us that it has passed already. Quoting KJV from 1611 because I like the used language and find it a clear text.
2 Thess 2, “That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand. Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;”
I feel are theology is different but I do not see the passage you gave as a good counter to identification of with the 70 AD. One can also hold that 70 AD was part of part of revelation but it's still to be fulfilled and completed. 70 AD seems to be something christ does predict and in astonishing fashion and a deeply important apocalyptic event.
Finally A point I feel you might disagree with but would be something I hold given we are talking about this period Constantine is ordained by god and it's Constantine that redeems Rome and finally gives us the counsel of Nicaea and Catholic Church (One may hold Catholic as per the Nicean creed not the necessarily modern day Roman Catholic Church, indeed most Churches hold they are Catholic in that sense.).
Again I am unsure as to the interpretation of the Revelation and do in that their is no dogma or authoritative interpretation and sources that I hold authoritative conflict I am unsure, but I find it an amazing book that is important to me.
Let me also clarify that this is not Tertullian position either he is firmly a futurist (At least of his time). I think Tertullian made many mistakes though he is a great doctor of the church.
1 John 2:18, “Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.”
The antichrist is often correctly or incorrectly made synonymous with the son of perdition, 2 Thessalonians 2:3-4,
“ Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.”
I do however think the views of the Fathers can not simply be dismissed and hold them in high esteem and as partially authoritative even outside counsels.