This is a very very dangerous situation. North Korea has nothing to lose, and for its leaders, a war with South Korea may be a last gasp and/or a way to distract the North Korean people from just how much of a failure the regime has been in the most basic terms of providing food, shelter, medical care, and decent lives for its citizens.
Again, language is telling. Only insane dictators issue public statements like this one:
"The army and people of [North Korea] are now greatly enraged at the provocation of the puppet group, while getting fully ready to give a shower of dreadful fire and blow up the bulwark of the enemies if they dare to encroach again upon [North Korea's] dignity and sovereignty even in the least. The group should not run amuck, clearly understanding the will and mettle of the highly alerted army and people of [North Korea] to wipe out the enemies."