Brother I'll tell you what I understand why you think it is speaking of 70Ad for the fulfillment of the Luke 21, and while I may not agree with you, speaking on it further will profit us nothing So tell me why you think all of these(going verse by verse) are not speaking of a physical mountain.
(Zech 14:3,
Ezekiel 11:23)
14.
Isaiah 2:2,
Joel 2:32 the physical mountain of the Lord's house/kingdom will be established(meaning this is the time after Christ divided the Mt of Olives and people are now able to enter into it-
(4) People of God will flee to the valley of the Mt. (Zech 14:5)
After this the Lord divides the mountain into a great valley(Zech 14:4-5) to which the people of the Lord will flee it will be the Lord's kingdom on earth until his coming in the Flesh. There will be peace in the valley(
Isaiah 11:6-10; 25:6-10; 65:20-25;
Ezekiel 28:25-26) and the Child shall live to be an hundred years(
Isaiah 65:20).
26.
Isaiah 27:12-13 the remnant shall be gathered one by one upon this highway to the Lord's holy mountain-
29.
Isaiah 52:1,
Nahum 1:15, Zech 14:21,
Joel 3:17 No unrighteous person will be able to enter into the Lord's kingdom/mountain
30.
Isaiah 56:1-7 only those who keep the Lord's Sabbath holy will be brought into the his Holy Mountain.
15.
Isaiah 11:9-12 at this time the Lord will set his hand the second time to recover the remnant of his people to his Holy mountain-
21.
Joel 2:32 these are those who shall call upon the name of the Lord these are the remnant who the Lord shall call into his mountain-
22.
Micah 4:1-4,
Isaiah 2:3-4 those who are among the many nations of the earth shall say to one another let us go up to that Holy mountain-