There is a sad trend in popular sf and fantasy to portray violence as the only means of resolving conflicts. You can see it reflected in shooter video games and action and zombie movies to name a few. The enemy is faceless and nonhuman so it's ok to kill them. That's the only way to survive. Peace is never an option. You can't negotiate with the Flood or the Heartless or the Darkspawn or the undead. Even the new STAR TREK movies are about blowing up supervillains; the tv series strove to resolve confrontations peacefully, but that doesn't make good action movies. Neil Degrasse Tyson said, "If you carry around a hammer, all problems begin to look like nails."
And now we have drone weapons that you can kill with impersonally without ever seeing your victims' faces. Remember how outraged you feel when some sick shooter in Colorado or Connecticut kills innocent men, women and kids? Happens all the time in places like Pakistan, and we can't understand why they hate us.
The idea that enemies are not like us so we have to kill them is something the human race needs to put behind us. The only ones who profit are the political hawks and religious fanatics who use it to send people to fight their wars and the rich who only want to carve up what's left. Why, as some would have Katniss do, give them what they want?