They, (Matt.), (Mark), (Luke), are the same thing in that they are addressing the same discussion. They are not the same in all the information they give. (Luke 21:20-24) addresses 70 A.D.
Quantrill
Luke 21:20-28 addresses the end of the age, when the armies of the nations that the Lord gathers around Jerusalem just before the coming of the Lord.
Behold,
the day of the LORD is coming,
And your spoil will be divided in your midst.
For I will gather all the nations to battle against Jerusalem;
The city shall be taken,
The houses rifled,
And the women ravished.
Half of the city shall go into captivity,
But the remnant of the people shall not be cut off from the city.
Then the LORD will go forth
And fight against those nations,
As He fights in the day of battle.
Zechariah 14:1-3
Jesus Himself fights against the armies at His Coming.
This is the context of Luke 21:20-28
“But
when you see Jerusalem surrounded by armies, then know that its desolation is near. Then let those who are in Judea flee to the mountains, let those who are in the midst of her depart, and let not those who are in the country enter her. For these are the days of vengeance, that all things which are written may be fulfilled. But woe to those who are pregnant and to those who are nursing babies in those days!
For there will be great distress in the land and wrath upon this people. And they will fall by the edge of the sword, and be led away captive into all nations. And Jerusalem will be trampled by Gentiles until the times of the Gentiles are fulfilled. “
And there will be signs in the sun, in the moon, and in the stars; and on the earth distress of nations, with perplexity, the sea and the waves roaring; men’s hearts failing them from fear and the expectation of those things which are coming on the earth, for the powers of the heavens will be shaken.
Then they will see the Son of Man coming in a cloud with power and great glory. Now when these things begin to happen, look up and lift up your heads, because your redemption draws near.” Luke 21:20-28
By saying “
And”, Jesus is connecting what He just said with what He is about to say. “And” is a conjunction that connect two paragraphs.
“They“ in verse 27 refers to the people He just mentioned which include the armies that surround Jerusalem at that time, the time of His coming just as Zechariah points out.
You can not divorce Luke 21:20-24 from verses 25-28.
Zechariah shows the whole chain of events, the armies surrounding Jerusalem at the time of the coming of the Lord.
Behold, the day of the LORD is coming,
And your spoil will be divided in your midst.
For I will gather all the nations to battle against Jerusalem...
Zechariah 14:1-2
You can deny it all you want but the word is clear.
JLB