They have a saying:"All is fair in love and war" which in the big picture seems to be true. Hopefully one day we will adopt better means and ways to solve conflicts that match up with our increased technology.
I was drawn into the PTSD that was being portrayed in the flick and could relate to it as my father suffered from violent out burst which no doubt was caused by PTSD when I was growing up. Anyway I wish they had spent more time with recovery of the PTSD in the film. War is a last resort option in my mind and all other means should be exhausted before using this option to solve issues. I think the possibility or potential is there but we will have to just wait and see but perhaps not in our lifetime but who knows.