This verse begins with the statement that all Jerusalem was carried away into captivity, but this is a Hebrew way of saying that the captivity involved a great many people from Jerusalem. In the conclusion of this same verse, the limitation of all Jerusalem
is mentioned because there we read that unimportant people were allowed to remain. But the top class, the middle class, and the smiths (who could make weapons) were taken to Babylon (see also Jeremiah 24:1 and Jeremiah 29:2). It is important to notice that army commanders, warriors, and blacksmiths were deported, with which Judah was militarily paralyzed.
14 He carried away all Jerusalem and all the officials and all the mighty men of valor, 10,000 captives, and all the craftsmen and the smiths. None remained, except the poorest people of the land.