As noted, the reason for such actions from the DPRK is provocation of two states. Thus, to give the hostile forces a military response is part of North Korea's legitimate right to self-defense.
"Maximizing our military capabilities of self-defense and applying a preemptive, predominantly nuclear strike," the message says..
Recall, as previously reported, "URA-Inform," the leader of the presidential race in South Korea, Mun Zhe Ying, is in favor of solving the nuclear problem with North Korea and creating there "a mechanism of peace". According to him, the DPRK should refrain from additional nuclear tests and accelerate its nuclear program.