The abomination of the desolation already happened, for before the desolation of Jerusalem, the set-apart place was profaned, in accordance to certain historical writings, like the writings of Josephus, that describe Titus being worshiped by his soldiers at the set-apart place, which is why Yeshuah said, when you see the "abomination of desolation", then let those in Judea flee, because the desolation of Jerusalem is at hand,
“So when you see standing in the set-apart place ‘the abomination that causes desolation,’ spoken of through the prophet Daniel–let the reader understand– then let those who are in Judea flee to the mountains. Let no one on the housetop go down to take anything out of the house. Let no one in the field go back to get their cloak. How dreadful it will be in those days for pregnant women and nursing mothers! Pray that your flight will not take place in winter or on the Sabbath. (Matthew 24:15-20)
“When you see Jerusalem being surrounded by armies, you will know that its desolation is near. Then let those who are in Judea flee to the mountains, let those in the city get out, and let those in the country not enter the city. For this is the time of punishment in fulfillment of all that has been written. How dreadful it will be in those days for pregnant women and nursing mothers! There will be great distress in the land and wrath against this people. They will fall by the sword and will be taken as prisoners to all the nations. Jerusalem will be trampled on by the Gentiles until the times of the Gentiles are fulfilled. (Luke 21:20-24)
And it was through the authority of the Roman emperors, such as Titus, who later became emperor of Rome, that the man of lawlessness came, the Roman popes, which fulfilled other prophecies. As I said, you have very little understanding of prophecy as it relates to actual history. You believe in a fantasy concerning the antichrist, when in fact, he already came.