It is still unhinged, but not because of nuclear weapons. Ukraine, and now Iran, showed the whole world what happens when you don’t have a nuclear deterrence.
I think the unhinged rhetoric is, in part, a necessary partner of the nukes. Because you need to not only have nukes but have your adversaries believe that you won't hesitate to use them. If North Korea had nukes, but the US didn't believe they would use them, then they'd be getting the Iran, Syria, Iraq, Libya, Afghanistan, etc, etc, etc treatment.
I think the unhinged rhetoric is, in part, a necessary partner of the nukes. Because you need to not only have nukes but have your adversaries believe that you won't hesitate to use them. If North Korea had nukes, but the US didn't believe they would use them, then they'd be getting the Iran, Syria, Iraq, Libya, Afghanistan, etc, etc, etc treatment.