if the sons took over. well yeah, that's also quite a bit of speculation. you do have a point, but the same logic could be applied to any lunatic in the world.
given the data iraq was no threat, what if it would...well what if russia reverted back to a dictatorship and nuked everyone's a**. you're talking about a preemptive strike, which is a controversial topic by itself. actually NK was being a pain in the a** through most of the 90' and somehow Iraq ended up first on the list.
and if you remember the start of the war in Iraq...how many tanks did we see? how much resistance there was? soldiers surrendered in thousands. even if one of his sons would get in power he wouldn't have the ability to do anything for a long time.
it's speculation yes, but the data presents quite a strong point if you ask me.
NK is by all means considered a threat now, not sometime in the future in some speculative scenario. also it wasn't dealt with before being able to make a functional nuclear bomb.
i see no reason why you don't push for war with NK if you agreed with Iraq.
as for the big ones going to war...let's see...nobody did anything about Chechnya, Kosovo, Serbia (close ally of Russia), Afganistan, Iraq, Georgia. yes, part of them weren't proper wars. sure friendship means nothing to them...but trillions of dollars trough trade do.
however i do agree that less lunatics in the world the better...just don't do it like Iraq, cause that caused even more lunatics to gain influence.