A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
eze 15:2THE WORTHLESSNESS OF THE VINE AS WOOD ESPECIALLY WHEN BURNT, IS THE IMAGE OF THE WORTHLESSNESS AND GUILT OF THE JEWS, WHO SHALL PASS FROM ONE FIRE TO ANOTHER. (Eze 15:1-8)
What has the vine-wood to make it pre-eminent above other forest-wood? Nothing. Nay, the reverse. Other trees yield useful timber, but vine-wood is soft, brittle, crooked, and seldom large; not so much as a "pin" (the large wooden peg used inside houses in the East to hang household articles on, Isa 22:23-25) can be made of it. Its sole excellency is that it should bear fruit; when it does not bear fruit, it is not only not better, but inferior to other trees: so if God's people lose their distinctive excellency by not bearing fruits of righteousness, they are more unprofitable than the worldly (Deu 32:32), for they are the vine; the sole end of their being is to bear fruit to His glory (Psa 80:8-9; Isa 5:1, &c.; Jer 2:21; Hos 10:1; Mat 21:33). In all respects, except in their being planted by God, the Jews were inferior to other nations, as Egypt, Babylon, &c., for example, in antiquity, extent of territory, resources, military power, attainments in arts and sciences.
or than a branch--rather, in apposition with "the vine tree." Omit "or than." What superiority has the vine if it be but a branch among the trees of the forest, that is, if, as having no fruit, it lies cut down among other woods of trees?
eze 15:4cast into . . . fire-- (Joh 15:6).
both the ends--the north kingdom having been already overturned by Assyria under Tiglath-pileser; the south being pressed on by Egypt (Kg2 23:29-35).
midst of it is burned--rather, "is on flame"; namely, Jerusalem, which had now caught the flame by the attack of Nebuchadnezzar.
Is it meet for any work--"it," that is, the scorched part still remaining.
eze 15:5If useless before, much more so when almost wholly burnt.
eze 15:6So will I give the inhabitants of Jerusalem, as being utterly unprofitable (Mat 21:33-41; Mat 25:30; Mar 11:12-14; Luk 13:6-9) in answering God's design that they should be witnesses for Jehovah before the heathen (Mat 3:10; Mat 5:13).
eze 15:7And I will set my face against them--(See on Lev 17:10).
from one fire . . . another--(Compare Isa 24:18). "Fire" means here every kind of calamity (Psa 66:12). The Jewish fugitives shall escape from the ruin of Jerusalem, only to fall into some other calamity.
eze 15:8trespass--rather, "they have perversely fallen into perverse rebellion." The Jews were not merely sinners as the other nations, but revolters and apostates. It is one thing to neglect what we know not, but quite another thing to despise what we profess to worship [JEROME], as the Jews did towards God and the law.
(1) Taken up by God's gratuitous favor from infancy (Eze 16:1-7); (2) and, when grown up, joined to Him in spiritual marriage (Eze 16:8-14); (3) her unfaithfulness, her sin (Eze. 16:15-34); (4) the judgment (Eze. 16:35-52); (5) her unlooked-for restoration (Eze 16:53 to the close).