The United Nations Vietnam Intervention Force was established to end the internal violence and help establish a stable government and lasting peace. Its mandate was never predicated on aggression: the force is there to protect civilians, which in its execution may, and indeed has required, use of lethal force against warlord parties. But the crucial fact is that its underlying methodology is defensive.
Greece's actions, by contrast, are fundamentally offensive: its rhetoric is highly provocative and it is advocating full-scale invasion of Japanese-held territory. It is precisely the same methodology used by Japan in China and Vietnam, and that UNVIFOR was established in an attempt to forestall: whatever Athens' claims about humanitarian ideals, what their plan actually entails is combat with the Japanese military first, and only afterward safeguarding civilians.
Greece paints the UN's unwillingness to back up this invasion as waffling; the truth is, UNVIFOR is merely adhering to its original mandate, a mandate that Athens accepted by pledging support to the mission, but in its jingoistic bloodlust Athens has scorned these values because it wants short-term change now. Greece's demand for open war with Japan is an attempt to drastically expand UNVIFOR's mandate well beyond its accepted parameters, and its willingness to jeopardize the neutrality of UN-held territory toward this goal betrays its abhorrent contempt for the original initiative.
I have to go soon and won't be back for the rest of the night, so I'll sum up the dilemma thusly: Greece thinks progress is too slow and a full-scale war with Japan is the only way to unify Vietnam. But its brinkmanship is trying to force the rest of UNVIFOR into a mission that it never signed up for, and throwing around ultimatums means we don't have time to actually debate it with a clear head, which is immensely irresponsible when so many lives, specifically Vietnamese, are on the line. Ailed can go to war with Japan if he wants (assuming he can handle the defensive pacts a unilateral invasion is sure to invoke), but the United Nations should not be internationally disgraced by his quite irrational aggression.