Do you apply this principle consistently or only when and how it suits you? Yes, absolutely it is a trick question.
Are you aware of any case where the US went to war under pretenses known to be false from the start, or interfered in the internal affairs of another country to cause loss of life, or allied with countries that committed terrorism against the US and others, etc. and none of the initiators suffered any consequences?
It's bad enough that morals can be twisted enough to justify just about anything and in any condition, and education these days lets anyone think they can justify anything simply by the fact that they said it. Don't add hypocrisy to that too.
>Do you apply this principle consistently or only when and how it suits you?
Of course, I do. Not to say I don't have biases, or that I'm always have an access to 100% correct information. Life's not that easy, of course, but it still doesn't mean that it's always blurry, relative, and let's do nothing as your nihilist approach suggests.
And then when in your 'aggressive defense' you end up hurting somebody else who now uses the exact same logic to start attacking you? This is how war (and terrorism) perpetuate endlessly.
It only ends when one side or the other, and anybody who might have empathized with them, is completely annihilated or when somebody stops behaving, from their perspective, righteously. Neither option is probable, which is why society just keeps replaying history on an endless loop in history, with little more than technology offering a change of scenery.
If you want to see what will happen tomorrow, simply learn about what happened yesterday. The only trick is realizing what role you're playing.
We have historical experience which pretty clearly shows that not increasing the price of aggression surely doesn't stop it. Contrary to what feel-good gurus say about "breaking the cycle of violence", in real life, it only breaks when the price of continuing is getting too high. And yes, when it comes to war it's definitely not a fairytale with all good men rewarded, and bad men punished. So if you wanted to say to that war is bad - I think almost nobody would oppose it. Not answering with weapons to weapons means there will be more of it, however.
They can certainly give it their best shot if they want to deal with the consequences. That's how the world actually works. Institutions like the UN are almost entirely powerless when it comes down to it, while eg NATO or the various militarily powerful nations are not. You can witness that with what has gone on in the invasion of Ukraine, what has the UN stopped or prevented? Nothing. The same will hold true when China invades Taiwan one day.
The countries with potent military capabilities dictate how everything goes in this world. It was true a thousand years ago, it was true a hundred years ago, and it's true today. It will always be true, for very obvious reasons.
Are you aware of any case where the US went to war under pretenses known to be false from the start, or interfered in the internal affairs of another country to cause loss of life, or allied with countries that committed terrorism against the US and others, etc. and none of the initiators suffered any consequences?
It's bad enough that morals can be twisted enough to justify just about anything and in any condition, and education these days lets anyone think they can justify anything simply by the fact that they said it. Don't add hypocrisy to that too.