[Maku]

Discussing war can be a very sensitive subject, depending on the people you're talking to:
How patriotic they are
How much their families were involved or changed by the effects of war i.e. if it's left a metaphorical stale taste in their mouths at the mention of a country that's responsible for a friend or a family member's casualty or death.
And possibly how much their country has or had been changed by war.

I think it's best to steer away from war topics to put it bluntly.