As long as its not based on a resolution of the UN security council that means nothing. Might makes right isnt part of international law of war. Just because we have actors who cant be held responsible for their illegal behavior at the moment doesnt mean we should just ignore international law altogether. Starting a war of aggression is still wrong and voters shouldnt be complicit in such actions by authorizing politicians to do so. Our continuous failure to do so in democracys sets an absolute horrible precedent, in which the voting population of a country is responsible for warcrimes. Might I remind everyone that that was the pretext for atrocities like the British punitive bombardments of German cities during WW2 or, since we had the anniversary last week, al Quaidas pretext for 9/11?
Ignoring international law sets a horrible precedent. If your side isnt adhering to it, the opposite side will neither. This warmongering risks yet again the few achievements we as humanity have made in the last century. I myself really dont want to see a future where i have to worry about state sponsored bio terrorism in response to a neocolonial might is right approach of my government.