Imagine that I have come to Rautatientori with a pistol. I aim it at one person, then at another, and tell them that I'll kill them all. Would anybody say "don't worry, she doesn't really mean it"? "Don't worry, it's just her usual rhetoric, just look at all her postings mentioning raping people with cactii." "She just wants to look scary so that people will give her some money." (I believe the technical term for the latter is "armed robbery".)
How long will I have to threaten before the talk starts to shift from "she doesn't really mean it" to "she probably doesn't really mean it, and her pistol is probably no good anyway, and she is probably a lousy shot"? And if I threaten to go home and get a proper automatic weapon, will people actually wait for me to do that?
If nobody is gonna take that shit from me, why are people taking it from a dude who a) actually has nukes, b) has threatened to attack the US and Japan with said nukes, and wipe South Korea from the face of the Earth, and c) whose only redeeming quality appears to be that he doesn't have a very good delivery system for said nukes - yet? Granted, kicking is ass his way harder than kicking mine, but he does appear a somewhat bigger threat as well, what with the nukes and a 1.2-million active-duty army (that's for a country with 24 million people - think about it).
10 years ago we (the US) invaded a country ruled by a dictator who was alleged to have weapons of mass destruction. Despite all the effort the weapons of mass destruction were not found, and I - despite not being a supporter of said war - remember thinking for a moment, in a rather cynical way, that it might be better to kick the guy's ass before he has the weapons of mass destruction and not after. And now there is a guy who actually has weapons of mass destruction, and has threatened several countries with them, and nobody is doing anything.
I think the only message to be learned from here is that if you happen to be an insane dictator, your best bet is to get some nukes. Pretty soon every dictator is gonna be getting nukes. Hell, I want to have nukes of my own, and I am not ever a dictator yet. I even have a grand plan for my nukes: gonna make a lot of noise, threaten a lot of neighbors, then give the nukes up and receive the Nobel Peace Prize.