Motives aside. North Koreas actions of removing IAEA (International Atomic Energy Agency) seals from their nuclear facilities, means that fissile material (Plutonium and Uranium) cannot be tracked. The only reason not to have seals in place is if theyre doing something they shouldnt. Even if they do replace seals and allow IAEA inspectors back in, they will have time to have moved fissile material about and have started their reactor producing low irradiated fuel which could easily be reprocessed in order to get high fissile Pu
.. and what does it matter if whats there when the inspector return doesnt quite add up to what was there when they left?
War or not, nuclear proliferation wont help anyone.