No worries, I understood that you were playing devil’s advocate somewhat. And indeed I don’t like it either, and fwiw, I’m not American either (European, so I don’t really have skin in this particular issue).
But when you say it’s a “rather valid decision with its motivations and reasons”, then yes, that’s basically what it means when I say it’s justified. But then you still have to ask the question as to who it is justified for. If you say it makes “sense on an economical and geopolitical level”, that’s well and good, but which economical and geopolitical level are we talking about? A deal such as this is unlikely to benefit the economy as a whole, so who are the beneficiaries? That’s the question of perspective. Probably this benefits Trump and his billionaire friends, hence why it’s justified from their perspective. But Average Joe, or the Argentinian equivalent, are unlikely to ever see a benefit from this.
I think there is an objective good. That goodness is Life itself. So long as we treat all Life with respect and try to live a life of balance, that makes us good. You are right though that this is still a very simplified view, and what it means to "live in balance" can depend on the situation or environment. But it's a starting point at least.
As for forgiveness, it's a choice. If someone makes an honest mistake, it should be easy to forgive them, as whatever harm they caused was not intentional. But if someone makes a wilful mistake, it will be harder to forgive them. And yet, because forgiveness is a choice, we can look at the reasons why someone acted in a manner that was harmful, and still decide to forgive them, especially if they repent.
As for consequences, those are results of our actions, whether intentional or unintentional. They are not strictly related to the concept of forgiveness, but generally speaking, we find it easy to forgive someone if their actions are harmless, or if the consequences don't affect us personally. But if someone's actions do affect us, we find it harder to forgive, regardless of whether something was an honest mistake or not. But the key to forgiveness, in my opinion, is that we need to look beyond the consequences and look beyond how we were personally affected. Forgiveness is a choice, and that choice is easier to make if our emotion is not muddied by consequence.