Father Arminjon and many other notables within the Church believed or believe the **entire **conversation was certainly **not ** about the first century and the end of the Old Covenant age.
Preterism is one of several interpretations, but it is not accepted by most as the only interpretation.
The footnotes within the NAB explain that it is not all preterism, that Jesus referred to both times, the first century destruction of the Temple and the Second Coming:
Footnote for [Matthew 24:1口25:46]
The discourse of the fifth book, the last of the five around which the gospel is structured. It is called the “eschatological” discourse since** it deals with the coming of the new age (the eschaton) in its fullness, with events that will precede it, and with how the disciples are to conduct themselves while awaiting an event that is as certain as its exact time is unknown to all but the Father **(Mt 24:36). The discourse may be divided into two parts, Mt 24:1口44 and Mt 24:45口25:46. In the first, Matthew follows his Marcan source (Mk 13:1口37) closely. The second is drawn from Q and from the evangelist’s own traditional material. Both parts show Matthew’s editing of his sources by deletions, additions, and modifications. The vigilant waiting that is emphasized in the second part does not mean a cessation of ordinary activity and concentration only on what is to come, but a faithful accomplishment of duties at hand, with awareness that
the end, for which the disciples must always be ready, will entail the great judgment by which the everlasting destiny of all will be determined.
Footnote - [Matthew 24:3]
The Mount of Olives: see note on Mt 21:1. The disciples: cf. Mk 13:3口4 where only Peter, James, John, and Andrew put the question that is answered by the discourse. In both gospels, however, the question is put privately: the ensuing discourse is only for those who are disciples of Jesus. When will this happen…end of the age?:
Matthew distinguishes carefully between the destruction of the temple (this) and the coming of Jesus** that will bring the end of the age.** In Mark the two events are more closely connected, a fact that may be explained by Mark’s believing that the one would immediately succeed the other.
Coming: this translates the Greek word parousia, which is used in the gospels only here and in Mt 24:27, 37, 39. It designated the official visit of a ruler to a city or the manifestation of a saving deity, and** it was used by Christians to refer to the final coming of Jesus in glory**, a term first found in the New Testament with that meaning in 1 Thes 2:19.
Footnote for [Matthew 24:8]
The labor pains: the tribulations leading up to the end of the age are compared to the pains of a woman about to give birth. There is much attestation for rabbinic use of the phrase “the woes (or birth pains) of the Messiah” after the New Testament period, but** in at least one instance it is attributed to a**
rabbi who lived in the late first century A.D. In this Jewish usage it meant the distress of the time preceding the coming of the Messiah; here, the labor pains precede the coming of the Son of Man in glory.
Footnote for [Matthew 24:9口12]
Matthew has used Mk 13:9口12 in his missionary discourse (Mt 10:17口21) and omits it here. Besides the sufferings, including death, and the hatred of all nations that the disciples will have to endure, there will be worse affliction within the church itself. This is described in Mt 24:10口12, which are peculiar to Matthew. Will be led into sin: literally,
“will be scandalized,”** probably meaning that they will become apostates;** see Mt 13:21 where “fall away” translates the same Greek word as here. Betray: in the Greek this is the same word as the hand over of Mt 24:9. The handing over to persecution and hatred from outside will have their counterpart within the church.
False prophets: these are Christians; see note on Mt 7:15口20. Evildoing: see Mt 7:23. Because of the apocalyptic nature of much of this discourse, the literal meaning of this description of the church should not be pressed too hard. However, there is reason to think that Matthew’s addition of these verses reflects in some measure the condition of his community.
[Pope Benedict referred to Maciel as a false prophet - a sign of the times…]
There are more footnotes that explain it, too much info to post, so here is the link:
usccb.org/bible/mt/24:01#48024001-1
[And that whole Roman legion thing representing the coming of the Son of Man - I have always felt that it did not adequately fit the text in Matthew and is too long of a stretch made by someone trying way too hard to force the words of Jesus in Matthew 24 to apply to the first century only. I feel the person who came up with that could not conceive and did not realize Jesus was speaking of both the first century AD and the last century at the same time.]
God bless you.