The problem with your perspective is that citizens can still tell right from wrong. And the public is much less Machiavellian than those in charge. The people can change how their leaders act, but won't when they believe any attempt to steer towards pro-social geopolitics is pointless.
I should also point out that some countries are much more bellicose than others, in direct contradiction with your nihilist view.
I should also point out that some countries are much more bellicose than others, in direct contradiction with your nihilist view.