Ahaz did not have faith in God, and so he was not going to be able to stand firm at all. He refused God’s promise, protection, and perspective. He turned in fear to what he really had faith in―an alliance with Assyria.
Minor Prophets: Zechariah, Portents of Apocalypse
Part of what makes this final chapter confusing is how Zechariah seems to oscillate between idyllic scenes and catastrophic scenes. However, reading this chapter with John’s Revelation suggests a cohesive overall narrative.