I didn't understand it when you posted it. So if the lawsuit is successful and they "win", the SA gov't telling them to "pound sand" is how their government is set up? That's why all my questions above seem like they have to be answered before we can get to particulars. I just don't see this as a scenario. I'd see the "pound sand" response happening well before it even getting to trial, right? Like the lawyers there refusing to take their case or the government's judges refusing to hear the case etc....but again, I don't know how this would work. Does anyone? We can come up with mythical scenarios all we want, but what's the point if we don't even know if they are possible?
However, if I were to indulge in your scenario here, I'd say it would be a good lesson for anyone trying to sue another nation and maybe it would make them think twice about doing it
I don't see why our government's response would be anything other than "sorry, can't help you....next time come to us first".