In Matthew 24, the apostles tell Jesus how wonderful
the buildings are as they're leaving the temple. Jesus
then tells them that the buildings won't have one stone
left upon another. This keys the apostles to ask Jesus
when all of it would end.
Jesus then tells them things that would happen off in
the future, that some would be killed, and many other
things that would happen that some would see. Obviously
some would die before ever seeing all the things Jesus
described, and others would see the things described.
Notice that Jesus never said they'd see them WHEN they
happened. For instance, John saw things off in the future
as described in Revelation, yet he was back in the 70AD
time frame when he saw the vision. So at least one person
saw some of the things to come, and others were killed
or died just like Jesus said they would.
There are many things listed in Matthew 24, some occurred
back in the time near Jesus's death, other things long
after.
What causes confusion for some, is this statement by Jesus
where it looks like Jesus is saying that all things would
be fulfilled during the generation of the apostles there
with Jesus:
Mt 24:32 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.
Remember, John saw future things happening and described
them in Revelation. John saw the vision back in 70 AD of
the generation where all things were then fulfilled. And
just like Jesus said, many of the apostles were killed
and never saw it.
Clearly, when Jesus told some they'd be killed and others
that they'd see it, he was speaking to specific people
during the discussion... some seeing, some not. So you
can't claim that any one person there would be seeing it
all, or not seeing any of it from being killed. Jesus
was telling them all, but all were not going to experience
all that he said.
Since John saw a vision of a future generation where
all is fulfilled, that future generation that recognizes
all things being fulfilled, they are that generation
that Jesus described.
God made it all, Jesus died for our sins.
Note: The above information was written by John P. Boatwright and is freely given. The information is simply my opinion based on how I perceive the content discussed. Anyone reading such should use their own judgement as to whether or not the information has any value to them. You may copy portions of the above opinions as long as a reference to this page is included and no text within said portion is altered. If copied to another medium other than the internet, include the entire text. The above content may change over time.
Best wishes.