Was the US dropping a nuke on Hiroshima a war crime? Or Firebombing entire cities? Unfortunately, "war crimes", while they have a clear international definition, tend to only apply to whoever loses wars. That's why the US passed a law requiring military intervention if the ICC tried to arrest an American general.

Here's Robert McNamara, US Defense Secretary during the Vietnam war, answering that question: "LeMay said if we lost the war that we would have all been prosecuted as war criminals. And I think he's right. He... and I'd say I... were behaving as war criminals"

Should we ban his books? Sanction people for interviewing him? If we did, we wouldn't have had that gem of a quote. That entire documentary, mostly composed of interviews of McNamara, is a powerful testament to the dangers of war for humanity. We don't want a situation where journalists are scared to interview people because of what the government might do to them in response.