His disciples had asked “Lord when shall these things take place...” Christ gave a general description of the times and his warning that exact times of his coming are only known by the Father in heaven. It was an admonition for all Gentile and Jewish Christians then(from the coming of the Holy Ghost) and in the times to come. I have to disagree with you. He said it to give us hope and a warning to stay watchful and spiritually prepared! As we seem now to have entered that general season since the founding of Israel...Lift your head up! Our salvation draws nigh!
The scene as found in Mark and Matthew is later that same evening, Jesus having been asked about the Temple and about when this destruction of the Temple would happen and His Second arrival on the planet, not in the air, on the planet. The short of it is that Jesus refers this private teaching to Daniel and that is how we know it is for the Coming Day of The Lord, which is a time of Judgment, not a time of escape. Chuck Missler, to name one excellent source, has a Youtube video giving the complete details on this placing of the Rapture and the Second Coming Day of The Lord, if you want to spend an hour or two listening to his excellent teaching.
The seventieth week of Daniel exposition is not given to James, John, Peter, and Andrew (and us you might say) as a comfort, unless the surety of His finishing His judgments is a comfort to you. The exposition gave details to see even now as the proof that He is going to return and set foot on this putrifacted Earth, as Gabriel was instructed to show Daniel.
The key to unravel this seeming puzzle is the standing of the abomination of desolation in the Holy of Holies. This same thing happened with Antiochus Epiphanes when he placed a statue of Zeus in the Holy of Holies, in 167 BC.
When the Romans razed the Temple to the ground, they did not commit this act of desecration in the Holy of Holies. They could not have done so because fire destroyed the temple before they could raid it and sack it, which ticked off Titus since he expected to get lots of Gold from the inside. The Roman soldiers gathered their banners at the Eastern gate and worshipped them, but they did not commit the abomination that makes desolate. But Jesus says this will happen mid-way in Dabiels seventieth week! So the Temple will have to be rebuilt and dedicated, having a 'Holy of Holies' section that the man of sin enters and stand there proclaiming himself to be god ... with TV will no doubt cover, so the whole world will see the desecration live.