Zechariah 12 (KJV) is the burden of Israel: Jerusalem becomes a burdensome stone, the nations gathered against her are struck, and the house of David mourns for the one they pierced. The LORD is taken as Jesus Christ, and Jerusalem, Judah, and the house of David are the land and people corresponding to modern Israel.

1 The burden of the word of the LORD for Israel, saith the LORD, which stretcheth forth the heavens, and layeth the foundation of the earth, and formeth the spirit of man within him.

The burden is the word of the LORD for Israel. The speaker is the one who stretches out the heavens, lays the foundation of the earth, and forms the spirit of man within him. That speaker is Jesus Christ. Revelation 4:11 and 10:6 likewise attribute creation of heaven and earth to the Lord.

2 Behold, I will make Jerusalem a cup of trembling unto all the people round about, when they shall be in the siege both against Judah and against Jerusalem.

He will make Jerusalem a cup of reeling to all the surrounding peoples, when the siege is against both Judah and Jerusalem (Israel). The city is the object that makes the attackers stagger.

3 And in that day will I make Jerusalem a burdensome stone for all people: all that burden themselves with it shall be cut in pieces, though all the people of the earth be gathered together against it.

In that day Jerusalem becomes a burdensome stone for all peoples. All who lift it are cut in pieces, even though all the people of the earth are gathered against it. Revelation 16:14–16 gathers the kings of the earth and of the whole world to the battle of the great day of God Almighty at Armageddon; Revelation 19:19 gathers the beast and the kings of the earth to make war against the one on the white horse. Zechariah states the result for those who burden themselves with Jerusalem: they are cut in pieces. The world is actively turning against Israel as we speak, fulfilling this prophecy.

4 In that day, saith the LORD, I will smite every horse with astonishment, and his rider with madness: and I will open mine eyes upon the house of Judah, and will smite every horse of the people with blindness.

In that day the LORD strikes every horse with panic and its rider with madness. He opens His eyes on the house of Judah and strikes every horse of the peoples with blindness. Mounted strength is disabled while Judah is watched over.

5 And the governors of Judah shall say in their heart, The inhabitants of Jerusalem shall be my strength in the LORD of hosts their God.

The leaders of Judah say in their heart that the inhabitants of Jerusalem are their strength in the LORD of hosts their God. Strength is located in the LORD, not in the horse.

6 In that day will I make the governors of Judah like an hearth of fire among the wood, and like a torch of fire in a sheaf; and they shall devour all the people round about, on the right hand and on the left: and Jerusalem shall be inhabited again in her own place, even in Jerusalem.

The leaders of Judah become like a firepot among wood and a torch in a sheaf. They devour all the surrounding peoples on the right and on the left. Jerusalem is inhabited again in her own place. The city remains Jerusalem; it is not relocated.

7 The LORD also shall save the tents of Judah first, that the glory of the house of David and the glory of the inhabitants of Jerusalem do not magnify themselves against Judah.

The LORD saves the tents of Judah first, so that the glory of the house of David and of the inhabitants of Jerusalem does not magnify itself against Judah. The outlying tents are delivered before the royal house and the capital.

8 In that day shall the LORD defend the inhabitants of Jerusalem; and he that is feeble among them at that day shall be as David; and the house of David shall be as God, as the angel of the LORD before them.

The LORD defends the inhabitants of Jerusalem. The feeble among them will be like David, and the house of David like God, like the angel of the LORD before them. Revelation 19:11–16 pictures the defender arriving on a white horse, with the armies of heaven, striking the nations; Zechariah places the defense over the inhabitants of Jerusalem and likens the house of David to the angel of the LORD.

9 And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem.

In that day Jesus Christ will seek to destroy all the nations that come against Jerusalem (Israel). Revelation 19:15, 21 has the sword from the mouth of the rider strike the nations, and the rest are killed by that sword. The object of the gathering in both books includes the assault on Jerusalem and the destruction of the assembled nations.

10 And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.

He pours on the house of David and the inhabitants of Jerusalem the spirit of grace and of supplications. They look on Him whom they have pierced and mourn for Him as for an only son, in bitterness as for a firstborn. John 19:37 cites the piercing. Revelation 1:7 says he comes with clouds, every eye sees him, and they also who pierced him, and all kindreds of the earth wail because of him. The pierced one is Jesus Christ, this is the moment that Israel acknowledges Christ as their Messiah. The mourning in Zechariah is located in the house of David and the inhabitants of Jerusalem.

11 In that day shall there be a great mourning in Jerusalem, as the mourning of Hadadrimmon in the valley of Megiddon.

In that day there is great mourning in Jerusalem, like the mourning of Hadadrimmon in the valley of Megiddo. Megiddo is the same place-name that appears as Armageddon in Revelation 16:16. Zechariah uses the valley as the measure of mourning; Revelation 16 uses it as the gathering place of the kings.

12 And the land shall mourn, every family apart; the family of the house of David apart, and their wives apart; the family of the house of Nathan apart, and their wives apart;

The land mourns, each family by itself: the house of David by itself and their wives by themselves; the house of Nathan by itself and their wives by themselves.

13 The family of the house of Levi apart, and their wives apart; the family of Shimei apart, and their wives apart;

The house of Levi by itself and their wives by themselves; the family of Shimei by itself and their wives by themselves. Royal, prophetic, and priestly lines are named separately.

14 All the families that remain, every family apart, and their wives apart.

All the remaining families mourn, each family by itself and their wives by themselves. The mourning is general across the land, not confined to one household.

Chapter 12 therefore makes Jerusalem a cup of reeling and a burdensome stone, strikes the horses of the nations gathered against her, saves the tents of Judah first, defends the inhabitants so that the feeble are like David, destroys the nations that come against Jerusalem, and pours out a spirit of grace so that they look on the one they pierced and mourn. The gathering of the nations against Jerusalem and their destruction overlap Revelation 16:14–16 and 19:19–21. The looking on the pierced one and the wailing overlap Revelation 1:7. The valley of Megiddo supplies the place-name used at Armageddon.