I didn't suggest the true temple doesn't stand. Matthew wrote "buildings of the temple." Mark wrote of the "great buildings" of the temple they had just exited. Luke summed those phrases with the word "temple." Luke was not an eyewitness, but might be compared to a modern highly conscientious investigative reporter.
Originally Posted by whirlwind
(NASB) Luke 1:1 Inasmuch as many have undertaken to compile an account of the things accomplished among us, 2 just as they were handed down to us by those who from the beginning were eyewitnesses and servants of the word, 3 it seemed fitting for me as well, having investigated everything carefully from the beginning, to write it out for you in consecutive order, most excellent Theophilus; 4 so that you may know the exact truth about the things you have been taught.
Since Luke was much closer to the event than you, and since his account was based on what he learned directly from the eyewitnesses, I'll have to take his word over yours.
From that vantage point He would have had a view not only of the buildings of the temple, but also retaining and city walls, surrounding homes, and other more distant structures, yet He only said the stones of the "buildings of the temple" (aka temple) would be thrown down. The "things" were component structures (buildings) of the temple which did sit upon a foundation. All that was surrounded by a wall, which was not a foundation as you like to claim. It was a wall.
The buildings of the temple were all things seen by Christ as He sat upon the mount of Olives. All the "things" you have listed which includes the foundation upon which they were constructed were the buildings of the temple.