Ok, the way I saw it, this is purely an RP conflict between two imaginary characters - Jien Kogen and Bas Angelos. The former being a stubborn xenophobic Japanese noble archetype and the latter being a Hitler mk II.
In my case, the player happens to enjoy playing an authoritarian dictator - Bas.
In the Character's eyes, KNF are being Japanese xenophobes/racists and it's not the first time either. Several times before they tried making his country a client state for the Japs and when that proved a failure, they resorted to threats and humiliation. Bas can't have that.
So... He saw the latest little messup with that destroyer as the last straw. Enough, up yours, bubai. Later that day the climate and moods with the force were such, that a spark was needed for them to start shooting KNF and they did just that. I joined in later thinking it's a KNF+CR furball aagainst GCs and others while all the sudden Pink told me it's the opposite! Got wtf'd and died anyway.
Whaatever... Neither Panzer nor Bas are gonna be sorry because both see it as utter bull from KNF.