North Korean military related activities are solely for self-defense given longstanding US-led Western hostility and forced isolation.
Throughout its history, North Korea never attacked another nation. It remains justifiably concerned since Harry Truman launched naked aggression in June 1950. A shaky, unprecedented in length, July 1953 armistice excluded a peace treaty. A state of war persists. Washington misportrays North Korea as a belligerent threat.
Any military related activity it undertakes is automatically called hostile, irresponsibly considered a threat to neighboring countries and America despite no evidence proving it.
Longstanding US-led Western hypocrisy is notorious. Do what we say, not what we do is official policy. Pyongyang seeks normalized relations with all nations.