Under What Circumstances is Betrayal Forgiven or Excused?

In most communities and to the general public betrayal is unaccepted and is never forgotten. For many it is hard to get by the past when it is thrown at you all the time and is the reason for your set-back. However, sometimes betrayal can be seen as an act of good, for the "greater good". You can never lose focus of what's more important and what needs to be done. In the Corporal's situation he was right to murder the little boy's parents. He could not put aside the importance of his country for the little boy's upbringing nor his future without parental impact. Somewhere though this can be seen as an act of bravery or an act of heartlessness. In Jonathan's case it is heartlessness. Jonathan could only see through this point of view because he
wasn't habituated to dilemmas nor sacrificing for the "greater good". However, the Corporal wasn't actually betraying anyone because he wasn't bound to one's trust nor was involved with the Tories. He just felt a sense of distraught for having to murder the little boy's parents. It was Jonathan that had felt the betrayal due to his lack of warfare experience.
Another example of betrayal that can be taken from Fighting Ground is the little boy's parents. The Corporal claimed that they were Tories disguised as civilians. Their betrayal to their country was unspeakable. I can understand that they probably betrayed their nation due to fear of survival but even after that how could you live with yourself after knowing that you were the cause of your country's loss or destruction? That you were the cause and reason for the deaths of your country's residents. Betrayal of this kind is not only seen as an unthinkable crime, but may taunt those for the rest of their lives haunting them with the fact that they were disloyal to their motherland.
Finally, the type of betrayal that is accepted in my opinion is the one that is told for the good of one's benefit. Not many see this and are as open to what isn't seen or given. Meaning, sometimes you might betray a loved one to protect them but end up being seen as the nemesis. It may be for their protection but you know that it was out of the good of your heart. Betrayal is one of those deeds you wish you're never put in a situation with where it is your only option.The truth is there's always another option. Many wish not to see them, many don't. The Tories sought the easy way out which never ends good and the Corporal did not see another way to end his dilemma. There is always different views of situations and you can understand Jonathan's due to him not being used to these conflicts. Although, does it mean that betrayal can be accepted if it was done with good intentions? Well, how can that be when the Tories betrayed their countries only to survive and due to fear which is an innocent intention but was still unacceptable? Betrayal is still a topic that can be debated in many ways. However, my theory is that it can be accepted if you not only did it with good intentions but were doing it for the good of others not yourself. Otherwise it is seen as a selfish need not something done for the "greater good". Perhaps it is being debated all around the world but not with the same view. What about you?