This is the mantra of all those who deny the basic reading and comprehension of the passage in question and in their attempts to uphold bible and prophetic inerrancy they support the errors you and many others make.Since they are unable to prove,conclusively from the available historical sources,the fulfillment of verses 36 onward, they invent the story of this being about the future and so believe they have successfully answered the critics.
The simple fact however is that,the passage in no way supports a jump into the future.That is obvious to many and hence some even say the imaginary transition takes place at verse 40.Neither is supported by the basic reading and comprehension of the passage.
No one is able to show the transition from the passage but simply claim it must be so because of the difficulty in matching the historical sources with scripture.I can do no such thing and remain honest to myself and to basic reading and comprehension.The passage has evidence of transitions from one king to another but this is not found from verse 21 to the end.This can only be a description of one king unless something is missing from the passage.Here again is the evidence of the transitions:
Where is the Evidence of a Gap in the 70 weeks of Dan 9?
For those who claim this is a description of the final anti-christ or the man of sin there is even more evidence that this is a colossal error.In both Daniel 2,and Daniel 7,at the conclusion of the events described, the coming of God's kingdom occurs.
Dan 2:
44
And in the days of these kings shall the God of heaven set up a kingdom, which shall never be destroyed: and the kingdom shall not be left to other people, but it shall break in pieces and consume all these kingdoms, and it shall stand for ever.
45Forasmuch as thou sawest that the stone was cut out of the mountain without hands, and that it brake in pieces the iron, the brass, the clay, the silver, and the gold; the great God hath made known to the king what shall come to pass hereafter: and the dream is certain, and the interpretation thereof sure.
Dan 7:
12As concerning the rest of the beasts, they had their dominion taken away: yet their lives were prolonged for a season and time.
13I saw in the night visions, and, behold, one like the Son of man came with the clouds of heaven, and came to the Ancient of days, and they brought him near before him.
14And there was given him dominion, and glory, and a kingdom, that all people, nations, and languages, should serve him:
his dominion is an everlasting dominion, which shall not pass away, and his kingdom that which shall not be destroyed.
There is nothing of this sort in this passage and the king described comes to his end and there is no description of the coming of the Lord bringing the king's reign to end.
Dan 11:
44But tidings out of the east and out of the north shall trouble him: therefore he shall go forth with great fury to destroy, and utterly to make away many.
45And he shall plant the tabernacles of his palace between the seas in the glorious holy mountain;
yet he shall come to his end, and none shall help him.
With all this in mind,one of the hard fact is really nothing at all and can have no bearing on the primary interpretation of the passage.All who do otherwise have invented stories not supported by the basic reading and comprehension of the passage.