Charles Ellicott Commentary Zechariah 12:8

"In that day shall Jehovah 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 Jehovah before them." — Zechariah 12:8 (ASV)

In that day an almost supernatural power will be given to Jerusalem through God’s favour, so that the weakest inhabitant will be a hero like David (see 1 Samuel 8:18), and the house of David will be as God, or rather, as supernatural beings, even as the angel of the Lord before them. (Compare Exodus 23:20 and following; Joshua 5:13 and following) The first part of this promise was notably fulfilled in the fact that the aged Mattathias was the initiator of that glorious struggle for liberty, which was afterwards carried on by his sons (the Maccabees).