Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

Mic 5:14 sums up the objects enumerated in Mic 5:10-13, which are to be exterminated, for the purpose of rounding off the description; the only objects of idolatrous worship mentioned being the 'ăshērim, and the only materials of war, the cities as means of defence. אשׁירים, written with scriptio plena, as in Deu 7:5 and Kg2 17:16, lit., stems of trees or posts standing upright or set up as idols, which were dedicated to the Canaanitish goddess of nature (see at Exo 34:13). ערים, cities with walls, gates, and bolts. These two rather subordinate objects are mentioned instar omnium, to express the entire abolition of war and idolatry. We must not infer from this, however, that the nation of God will still have images made by human hands and worship them, during the stage of its development described in Mic 5:10-14; but must distinguish between the thought and its formal dress. The gross heathen idolatry, to which Israel was addicted under the Old Testament, is a figure denoting that more refined idolatry which will exist even in the church of Christ so long as sin and unbelief endure. The extermination of every kind of heathen idolatry is simply the Old Testament expression for the purification of the church of the Lord from everything of an idolatrous and ungodly nature. To this there is appended in Mic 5:15 a promise that the Lord will take vengeance, and wrath, and fury upon the nations which have not heard or have not observed the words and acts of the Lord, i.e., have not yielded themselves up to conversion. In other words, He will exterminate every ungodly power by a fierce judgment, so that nothing will ever be able to disturb the peace of His people and kingdom again.