Albert Barnes Commentary Zechariah 12:7

"Jehovah also shall 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." — Zechariah 12:7 (ASV)

The Lord also shall save the tents of Judah first - Still it is, the Lord shall save. We have, on the one side, the siege, the gathering of all the peoples of the earth against Jerusalem, the horse and his rider. On the other, no human strength; not, as before, in the prophecy of the Maccabees, the bow, the arrow, and the sword, though in the hand of God (Zechariah 9:13). It is thrice, I will make (Zechariah 9:2–3); I will smite (Zechariah 9:4); and now, The Lord shall save. By the tents, he probably indicates their defenselessness.

God would save them first; that the glory of the house of David—that it be not great against or over Judah,—may not overshadow it; but all may be as one. For all is the free gift of God, the mere grace of God, that he that glorieth may glory in the Lord (Jeremiah 9:24; 1 Corinthians 1:31; 2 Corinthians 10:17), and both “may own that, in both, the victory is the Lord’s” (Jerome).

Lap.: “In Christ Jesus is neither Jew nor Greek; neither bond nor free, neither rich nor poor” (Galatians 3:28); “but all are one,” namely a new creation; indeed, in Christendom the poor are the highest, both because Christ “preached to the poor” (Luke 4:18), and pronounced the “poor blessed” (Luke 6:20), and He made the Apostles, being poor, nobles in His kingdom, through whom He converted kings and princes, as is written, “you see your calling, brothers, that not many wise men after the flesh, not many mighty, not many noble are called, but God has chosen the foolish things of the world to confound the wise, and the weak things of the world to confound the things which are mighty...” (1 Corinthians 1:26); and, “Has not God called the poor in this world, rich in faith, and heirs of the kingdom, which God has promised to them that love Him?” (James 2:5). The rich and noble have greater hindrances to humility and Christian virtues than the poor.

For honors puff up, wealth and delights weaken the mind; therefore they need greater grace of Christ to burst their bonds than the poor. Therefore, for the greater grace shown them, they are bound to give greater thanks to Christ.”