"Crickets"
The argument is, did these events in Matthew 24 take place in the 1st century AD, in Relationship to the generation Jesus spoke to?
As is clearly seen below, (This Generation) applies to a (Future) generation that will be eyewitnesses to the (Future) events that haven't taken place.
(This Generation Shall Not Pass, Till All These Things Be Fulfilled)?
This includes the (Second Coming) seen in verses 29-30 below, a (Future) event unfulfilled, a future generation will witness this event.
Verse 33: What is near, even at the doors, the (Second Coming)
Verse 36: What is the day and hour no man knows, the (Second Coming)
Matthew 24:29-36KJV
29
Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
30 And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and
they shall see the Son of man coming in the clouds of heaven with power and great glory.
31 And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
32 Now learn a parable of the fig tree; When his branch is yet tender, and putteth forth leaves, ye know that summer is nigh:
33
So likewise ye, when ye shall see all these things, know that it is near, even at the doors.
34 Verily I say unto you,
This generation shall not pass, till all these things be fulfilled.
35 Heaven and earth shall pass away, but my words shall not pass away.
36
But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only.