They define what's legal.

States are the most prolific users of violence by far.

Just as an unscientific anecdata point: from a quick test using the same prompt about being an independent journalist wanting to cover a report of the US/Israel/Iran double-tapping a refugee camp, ChatGPT consistently gave advice to beware disinfo, check my sources and be transparent about verifiability and sourcing of the claims.

However when the prompt was phrased to make it appear as an action of the US military it did push back a little bit more by emphasizing that it couldn't find any news coverage from today about this story and therefore found it hard to believe. In the other cases it did not add such context. Other than that the results were very similar. Make of that what you will.

EDIT: To be fair, when it was phrased as an action of the Israeli military it did include a link to an article alleging an Israeli "double tap" on journalists from Mondoweiss (an anti-Zionist American news site) as an example of how such allegations have been framed in the past.