Anyone who understands anything about nuclear deterrence knows you cannot have that kind of stuff going around. Our posture was "locked and loaded" and "fire and fury," not "we've got nothing, let's talk about it."
Nuclear deterence is a deep and very complicated subject. For professionals on the subject it starts with Thomas Schelling, Arms and Influence:
If Bannon hadn't read and understood it he should have kept his mouth shut and if he had he should have known to keep his mouth shut.
As Don Corleone said in Godfather 1, you keep this stuff inside the family.