Matthew Poole and continuators on Lamentations 2:3

3 He hath cut off in his fierce anger all the horn of Israel : he hath drawn back his right hand from before the enemy , and he burned against Jacob like a flaming fire, which devoureth round about .

That is, the beauty and strength of Israel, so horn signifieth by an usual metaphor in Scripture, Psal. 75.4. Ier. 48.25, &c. the horn being much the beauty of the Beast, as also that member by which the beast puts forth its strength in assaulting its adversary.

Either God hath drawn back his assistance which he was wont to give the Iews against their Enemies. Or Israel through Gods leaving of them, hath drawn back his right hand, but it seems rather to be understood of Gods weakening the Israelites right hand, so as they were not able to hold them up (as before) against their Enemies.

God had consumed them, not in this or that part, but round about, as a fire siezing an house or heap of combustible matter at once, on all sides.