“How is not being mindful about national security (with regards to North Korea) “of the Spirit”?”
Simple. We are to strive to the best of our abilities to live at peace with everyone. Romans 12:8 A couple of things in regards to NK: 1) After what happened to Libya following their disarmament of nukes and their subsequent US invasion, North Korea is not up for any talk of them giving up nukes, either. 2) They see the US as who developed the 1st Atom bomb & they saw what happened to Japan.
You’re problem appears to be that you come from a perspective that war is inevitable.