Sounds like something you concocted with no one from the historical record to back you up.
You do realize that those Roman armies in 66AD retreated and were ambushed on their route back to Rome. There was not a 3 year seige of Jerusalem. Jersuslaem was taken by surprise 3 years later, again. The majority of the Jews killed in 70AD were from all over the empire. The Romans would not let them return to their homelands. They were caught between the rebels and the Romans. They were not Christians. No matter how you try to spin history, it will not work out for whatever you are pushing.
None of this is relevant. The coming of Cestius Gallus in 66 AD, and his retreat, afforded Jewish believers the opportunity to escape, paying heed to Jesus' warning to "flee to the mountains" when they see this thing happening.
The fact is, it did happen! I wouldn't say that Luke called the Roman Army "the desolation," but that is how he described what Jesus said with respect to the Roman Army--they would "desolate" Jerusalem and the temple. So it is accurate to say that Luke's version used "desolation" in place of "abomination of desolation" in Matthew and Mark's versions. It goes without saying that the Army coming to destroy the temple was to the Jews an "abomination!"
So the full term, "abomination of desolation," was a reference back to the same in Dan 9.27. In Dan 9.26-27 you can see that the AoD had to do with the destruction of the city and the sanctuary, which I believe could only refer to the 66-70 AD event, which led up to the destruction of these. And since Dan 9 placed this event in the time of Christ's death, and since Jesus placed this event in his own generation, I don't think there can be any mistaking that Jesus was referring to the Roman Army as the "abomination" that would "desolate" Jerusalem and the temple.
So most of this consists of the confusion between Luke's version and Matthew and Mark's version. So let's just get honest and look at the versions together. Please note that in the *exact same spot* where Matthew and Mark mention the AoD, Luke describes the Roman Army desolating Jerusalem! Sandwiched in between "stand firm" and "flee to the mountains" looms large the necessary conclusion that the Roman Army of Luke 21 is, in fact, the Abomination of Desolation in Matthew 24 and Mark 13.
Even if you don't agree with this conclusion, you should at least give it consideration...
Luke 21.19
Stand firm, and you will win life.
20 “
When you see Jerusalem being surrounded by armies, you will know that its desolation is near. 21 Then let those who are in Judea
flee to the mountains.
Matt 24.13 but the one who
stands firm to the end will be saved. 14 And this gospel of the kingdom will be preached in the whole world as a testimony to all nations, and then the end will come.
15 “So
when you see standing in the holy place ‘the abomination that causes desolation,' spoken of through the prophet Daniel—let the reader understand— 16 then let those who are in Judea
flee to the mountains.
Mark 13.13 Everyone will hate you because of me, but the one who
stands firm to the end will be saved.
14 “
When you see ‘the abomination that causes desolation’ standing where it does not belong—let the reader understand—then let those who are in Judea
flee to the mountains.
It is reasonable, therefore, to conclude that the "holy place" is Jerusalem, and it is Jerusalem being desolated by the abominable Roman Army.