Would a Nork H-bomb dropped mid-Pacific frighten the nations in the region into lining up with the U.S. & hoping for a decisive U.S. response, or would they all seek to make their peace with Satan & appease the little dictator?
I can't speak for them, and people often don't exhibit what I regard as "good sense", but I presume it will convince them that this guy is a dangerous nut and that he needs to be defanged.
Presumably he can't have too many of these things, because it takes quite awhile to make enough plutonium to power one, plus all the machining involved in fashioning a core.
Let him blow one up, and his stockpile is that much smaller, plus other people will more clearly see the danger of letting this "God-Child" believe he is divine.