Jesus does mention the destruction of the Temple , Yes it was a Prophecy.
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And where was that?
It was prophesied in Revelation, which was easy to do, being as Revelation was written after the fact. I can predict the winners of Superbowls XXXVII and XXXVIII just as easily.
Since the destruction of the First temple had already occurred, and the second temple was built by Herod, a fellow who was not considered a real Jew by the Pharisees, I imagine that the destruction of the second temple was on the minds of many believers.
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My grandfather was Methodist minister whose obsession in life was to get my father to become a minister as well. I think he promised God or something. Dad did not want to be a preacher, and deliberately flunked out of SMU, got a job with the railroads, traveled around the country and attended Texas Tech the first year it opened, and eventually moved to Kansas City. I didn't see my father's father much, as he lived in Texas and I grew up in Missouri. One thing I remember is that I never saw him smile. Not once. My grandmother liked to brag, for some reason or another, that my grandfather's feet were so small he had to wear Boy Scout shoes. As I recall, she said this once with a perfectly straight face, and I looked down and the old man was wearing wingtips.
Boy Scout shoes never came in wingtips.