What part of JESUS words do you not understand?
“Immediately after the tribulation of those days the sun will be darkened, and the moon will not give its light; the stars will fall from heaven, and the powers of the heavens will be shaken. Then the sign of the Son of Man will appear in heaven, and then all the tribes of the earth will mourn, and they will see the Son of Man coming on the clouds of heaven with power and great glory. And He will send His angels with a great sound of a trumpet, and they will gather together His elect from the four winds, from one end of heaven to the other.
The elect?
The gathering of the elect here is gathering the Jewish believers who that this point are in heaven. It refers to the resurrection of the dead born again Jews of the entire Jewish age (pre-Church Age, who were originally in the Earth in "Abraham's bosom", but Christ took them with Him into heaven. Next, we also have the Tribulational believing Jews who died/were martyred . . .
In Matthew, Jesus was speaking to Jews...as a Rabbi!
Not the Church!
There was no church yet existing until Acts, Chapter 2.
Matthew's passage speaks of the returning of Christ to put an end to the Tribulation, and to begin His promised Millennium, as promised to the Jews.
The Jews knew from the Torah that the Lord was to set up His kingdom on earth and reign over them!
Isaiah 65:17-25
“See, I will create
new heavens and a new earth.
The former things will not be remembered,
nor will they come to mind.
But be glad and rejoice forever
in what I will create,
for I will create Jerusalem to be a delight
and its people a joy.
I will rejoice over Jerusalem
and take delight in my people;
the sound of weeping and of crying
will be heard in it no more.
“Never again will there be in it
an infant who lives but a few days,
or an old man who does not live out his years;
the one who dies at a hundred
will be thought a mere child;
the one who fails to reach a hundred
will be considered accursed.
They will build houses and dwell in them;
they will plant vineyards and eat their fruit.
No longer will they build houses and others live in them,
or plant and others eat.
For as the days of a tree,
so will be the days of my people;
my chosen ones will long enjoy
the work of their hands.
They will not labor in vain,
nor will they bear children doomed to misfortune;
for they will be a people blessed by the Lord,
they and their descendants with them.
Before they call, I will answer;
while they are still speaking, I will hear.
The wolf and the lamb will feed together,
and the lion will eat straw like the ox,
and dust will be the serpent’s food.
They will neither harm nor destroy
on all my holy mountain,”
says the Lord."