I beleive it was smart.
North Korea wants any excuse and certainly the Sony execs have families in Japan that might end up being targets. Japan has every legitimate reason to end up fearing that that sociopath might do to them in retaliation for exposure of his regime. Even “Team America: World Police” isn’t being played, as was originally suggested as a replacement.
Kim Jong-Un is indeed worse than his father and far more crafty. Given his youth, he has more time.
You know that appeasement never works right?
Clinton and Madeline Halfbright gave him that time, and nukes, just as they made 9/11 possible. The EMP threat is sadly inevitable. It is only a matter of scale and geographic coverage. I suspect it won't be as widespread as feared, but for those states affected, the death count will be unprecedented.