You mean the seminaries of Historicism says it already happened. God's Word never said it was fulfilled.
As a matter of fact, the "abomination of desolation" event Jesus quoted from the Book of Daniel is about this event in Jerusalem...
Dan 11:30-31
30 For the ships of Chittim shall come against him: therefore he shall be grieved, and return, and have indignation against the holy covenant: so shall he do; he shall even return, and have intelligence with them that forsake the holy covenant.
31 And arms shall stand on his part, and they shall pollute the sanctuary of strength, and shall take away the daily sacrifice, and they shall place the abomination that maketh desolate.
KJV
That area in red is where our Lord Jesus was quoting from the Book of Daniel in His Olivet discourse:
Matt 24:15-27
15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:)
16 Then let them which be in Judaea flee into the mountains:
17 Let him which is on the housetop not come down to take any thing out of his house:
18 Neither let him which is in the field return back to take his clothes.
19 And woe unto them that are with child, and to them that give suck in those days!
20 But pray ye that your flight be not in the winter, neither on the sabbath day:
21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
22 And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
23 Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
25 Behold, I have told you before.
26 Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
27 For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
KJV
Those events Jesus foretold us have NEVER HAPPENED TO THIS DAY.
The closest example of fulfillment of the AOD was with Antiochus IV who conqured Jerusalem, went into the 2nd temple and sacrificed swine upon the altar thus desolating it, and then setup an idol abomination to Zeus worship. But Antiochus did that about 200 years BEFORE Jesus quoted from Daniel about this event in Matthew 24! So those claiming the AOD was past history, and citing Antiochus, show egg on their face.
Now in 70 A.D. when the Romans took Jerusalem and destroyed it, per the Jewish historian Josephus (100 A.D.), the Romans tried to capture the temple. The Roman general Titus had no intention of destroying it. Yet the temple caught fire inside it during the battle over it, and it burned down. No doubt the Jews set fire to it inside the temple to prevent the Romans from desolating it like Antiochus did in 165 B.C. Thus the Romans could not... desolate the temple in 70 A.D., because it burned, melted the gold, which the Romans then went after, destroying it completely; well almost, the Western Wall is still standing today, which shows Jesus' prophecy that not one stone atop another there hasn't been fulfilled yet.