Kristof claims that Israel doesn't want reporters in Gaza so they can't interview "survivors."
But in fact, Gazans can be interviewed via ubiquitous cell phones, and if you want in-person interviews, tens of thousands of Gazans have left Gaza since the war started, either via Egypt (estimated over 100k) or via Israel for medical reasons and other humanitarian purposes (I think I read around 40K).
So there is no shortage of Gazans to interview, but Kristof is intent on demonizing Israel, not on being honest.
This endless destruction is why Netanyahu does not allow journalists into Gaza. If he actually believed that Israeli had shown great restraint and that public perceptions were mistaken, we'd all be invited in with cameras. But Bibi doesn't want the devastation documented or the survivors interviewed.