CHAPTER 12 Dec. 27 
Destruction for Jerusalem’s Enemies 
An oracle. The word of Yahweh concerning Israel. Yahweh, who stretches out the heavens, and lays the foundation of the earth, and forms the spirit of man within him says: 2Behold, I will make Jerusalem a cup of reeling to all the surrounding peoples, and on Judah also will it be in the siege against Jerusalem. 3It will happen in that day, that I will make Jerusalem a burdensome stone for all the peoples. All who trample upon it will be severely wounded, and all the nations of the earth will be gathered together against it. 4In that day, says Yahweh, I will strike every horse with terror, and his rider with madness; and I will open My eyes on the house of Judah, and will strike every horse of the peoples with blindness. 5The chieftains of Judah will say in their heart, ‘The inhabitants of Jerusalem are my strength in Yahweh of Armies their God’. 6In that day I will make the chieftains of Judah like a pan of fire among wood, and like a flaming torch among sheaves; and they will devour all the surrounding peoples, on the right hand and on the left; and Jerusalem will yet again dwell in their own place, even in Jerusalem. 7Yahweh also will save the tents of Judah first, that the glory of the house of David and the glory of the inhabitants of Jerusalem be not  magnified above Judah. 8In that day Yahweh will defend the inhabitants of Jerusalem. He who is feeble among them at that day will be like David, and the house of David will be like God, like the angel of Yahweh before them. 9It will happen in that day, that I will seek to destroy all the nations that come against Jerusalem. 
Look on Me Whom They Have Pierced 
10I will pour on the house of David, and on the inhabitants of Jerusalem, the spirit of grace and of supplication; and they will look to Me whom they have pierced; and they shall mourn for him, as one mourns for his only son, and will grieve bitterly for him, as one grieves for his firstborn. 11In that day there will be a great mourning in Jerusalem, like the mourning of Hadadrimmon in the valley of Megiddon. 12The land will 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; 13the family of the house of Levi apart, and their wives apart; the family of the Shimeites apart, and their wives apart; 14all the families who remain, every family apart, and their wives apart.

Commentary

12:3 Trample upon it - The LXX of this verse is quoted in Lk. 21:24 as having a specific fulfilment in the last days before Christ returns. 
12:10 This states that men would look upon the pierced (i.e. crucified) Saviour, and mourn in recognition of their own sinfulness. This verse is quoted as having fulfilment both at the crucifixion (Jn. 19:37) and also at the final judgment (Rev. 1:7). There is strong connection between these two events. The cross divided men into two categories: The repentant thief and the bitter one; the soldiers who mocked and the Centurion who believed; the Sanhedrin members who believed and those who mocked; the women who lamented but didn't obey His word, and those whose weeping isn't recorded, but who stood and watched and believed. As we come before the cross in our minds, we are naturally driven to self-examination. There our thoughts are revealed (Lk. 2:35). This is why self-examination should occur naturally if we break bread properly, i.e. with our minds focused upon Him as He hung there.
Only son… firstborn- The Jews will come to understand something of God’s grief at the death of His only Son.
Pierced- It’s possible that the Lord Jesus still has marks in His hands and side where He was crucified- 13:6 may imply that the Jews of the last days will look upon them. He had them after His resurrection (Jn. 20:27), and marks of death were visible in the vision of Jesus which John saw (Rev. 5:6). Perhaps for absolute eternity He will carry these marks as a constant reminder to us all of the price paid for our redemption.