Shared ground
The verse presents the aftermath of David’s victory over an Ammonite city: the captured population is brought under Israel’s control, then subjected to severe treatment described with saws, iron tools, and axes. The writer then treats this as more than a one-time event, summarizing it as David’s policy “to all the cities of the Ammonites,” and closes with a clear endpoint: David and the whole force return to Jerusalem.
Two themes sit on the surface of the text. First, the king’s campaign is portrayed as decisive and comprehensive (“all the cities”). Second, the account is terse and outcome-focused, moving quickly from conquest to punishment to restoration of order at the capital.
Where interpretation differs
The main question is what, exactly, the tool language means. Some read it as describing executions carried out with these implements. Others argue it could describe forced labor using such tools (for example, assigning captives to work with cutting and crushing implements), with the wording functioning as a vivid, compressed way to describe subjugation.
A related question is scope: whether “the people” refers mainly to captured fighters or includes the broader city population. The text itself does not specify.
Why the disagreement exists
The disagreement exists because the verse uses brief, graphic tool imagery without explaining the procedure. It also contains summary-style phrasing (“thus did David…”) that can read either as a straightforward description of what happened everywhere, or as a conventional way of saying the same kind of harsh subjugation was imposed across Ammonite towns.
What this passage clearly contributes
Explicitly, the text contributes a closing snapshot of royal warfare: victory leads to harsh punishment, this outcome is presented as widespread across Ammonite cities, and the campaign ends with the army’s return to Jerusalem. Theologically (by inference rather than direct statement), it contributes to Chronicles’ broader portrait of David as an effective ruler whose wars reach clear resolution and re-center on Jerusalem after successful campaigns (compare the Chronicler’s general emphasis on David’s stable rule, e.g., 1 Chronicles 17:11–14).