The context of the chapter MUST be understood as an answer to this three part question, and NOT ONLY the stones falling.
1. When will these things be. (not be left here one stone upon another, that shall not be thrown down.)
2. What will be the sign of thy coming/parousia/return.
3. What will be the sign of the end of the world. (consummation of the age or completion of all prophecies.)
"Verse 33-34 So likewise ye, when ye shall see all these things, know that it is near, even at the doors. Verily I say unto you, This generation shall not pass, till all these things be fulfilled."
Jesus uses the word 'THIS.' THIS is also translated "THE SAME." Meaning THE SAME generation that sees and endures the events and conditions he previously spoke about between verses 3-32. It's THE GENERATION on earth during the time of his return and nothing else. NOT the generation he is speaking to!
"Even so, this generation shall not pass, till all these things be fulfilled."
The word 'likewise' is the same as saying 'even so' or 'so thus'...
It connects what Jesus previously said between verses 4-31, to what Jesus said about, “this generation shall not pass, till all these things be fulfilled.” That alone debunks the idea that Mathew 24 was meant for the generation of 70 AD.
VINES...Likewise...
Even (Adverb, Etc.), Even As, Even So:
a conjunction, is usually a mere connective, meaning "and;" it frequently, however, has an ascensive or climactic use, signifying "even," the thing that is added being out of the ordinary, and producing a climax. The determination of this meaning depends on the context.
So likewise ye, when ye shall see all these things, know that it is near, even at the doors. Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
You would be hard pressed convincing me and many others that those events HAVE PASSED!