Would like to hear form @IntlProfessor what he reads into this. As ominous as it looks at first sight?
I have no special expertise but your inference scares the excrement out of me, and you may be right. In the Iraq War there was much more preparation for this, even before 9/11 and Bush's first election, there was a group preparing for invasion of Iraq (
Project for the New American Century - Wikipedia) Most of his later advisers were associated with that group, including Dick Cheney. This time we have been prepared only because of tweets, but the lead up to the Iraq war was much more substantial and professional. More professional still was Bush I's lead up to the First Gulf War, getting substantial allied approval beforehand. You and I don't expect that to happen because Trump wouldn't get approval by the UN or other allies, with the possible exception of the Japanese or South Koreans which I consider unlikely.
Referencing this article I posted earlier about taking out a missile during the boost phase:
https://www.nap.edu/read/13189/chapter/4#34, especially pages 50-51 from which I quoted.
Though the article concluded the Aegis technology was problematical of success then, some five years later we might have technology able to target the flame of a launch using improved Aegis armament. Of course, taking out the nuclear test facility (which is what may be considered now), is a fixed location and easily monitored by satellite and other imaging--a much simpler target. I read recently the Vinson carrier task force is accompanied by two Aegis class cruisers. They have the weapons of choice which would not risk the lives of pilots. Kim has already said it would be destroyed and since he has mobile launched ballistic missiles which could be rolled out of hangers on a moments notice, a retaliatory nuclear strike against our ships should be considered in the balance.
Ask any naval commander about the worry he/she has about a near miss of a nuclear weapon exploded at sea. You've probably seen the tests of early hydrogen bombs where we invited the world's naval attaches to view a demolition of a navy larger than almost all others with but one explosion. Remember the movie about tornadoes, "oh, watch out for a flying cow!" Imagine, or look up the old test video, "oh, flying aircraft carrier on the right, followed by a destroyer,...." But you get the picture. I suspect Kim does not have hydrogen bombs, 1000 times more potent than Hiroshima, but baby nukes like that are not just firecrackers either.
By the way, the commander of the Vinson task force is a female admiral. How poetic if she is the one who is relieved of command for not following orders.
When the French were besieged in 1954 at Dien Bien Phu Admiral Radford, then Jt. Chiefs Chairman, and Allen Dulles, head of the CIA, approached Eisenhower proposing the use of nuclear weapons. Eisenhower said to consult with Congressional leaders Lyndon Johnson and Sam Rayburn about it. In turn, they counseled, "consult with our allies." When Radford/Dulles flew to London Clement Attlee knew all about it and refused cooperation. I have no idea how the Chief and Director would use nuclear weapons in guerrilla war, which we taught the Vietnamese how to do against the Japanese during WWII. I do know that Eisenhower was a very crafty politician, not selected for his strategic vision by Roosevelt, but for his political skill. Of course he knew Attlee personally.
(On Eisenhower's political astuteness, before it became generally understood by the cognoscenti, see Gary Wills,
Nixon Agonistes.) I would have voted for Ike both times had I the franchise. Ike did not let his limbic brain rule his cortex. Trump's brain, on the other hand...you can tell from the size of his hands.
The best move for Kim would be to never again test a nuclear weapon; this next bluff by Trump is designed for that outcome. But what if their bully calls our bully's bluff? I don't like this game. Whenever played before with bullies it leads to war. (I can't give you a statistical count, distinguished students of the subject can. Neroden?)