The Edomites took advantage of the setbacks of Ahaz and were perhaps in league with Rezin (see 2 Kings 16:6 note). The pitilessness of …

For again. — And moreover.

Smitten Judah. — Smitten in Judah, i.e., inflicted a defeat u…

The Edomites had been under subjection to Judah; but now that God had left her, Judah could not hold her position.

For again the Edomites had come
As in the days of Jehoshaphat, (2 Chronicles 20:10) ,