Wow.
Just nuke-worthy.
Those two words work, as well.
I think actions, not words, are nuke-worthy. For instance, Chinese figures have said they would nuke American cities if the US came to Taiwan's rescue during an invasion. Now, if they actually nuke American cities, retaliation would be obligatory. It's clear from the fact that we haven't rained nukes on China that their provocative words alone aren't nuke-worthy, and these were high-level military officials talking about future contingencies rather than civilian officials talking about the past.