"When I woke up, I was led by two voices, one like the sound of thunders. And the other civilized, polite. We've been comrades ever since, but now we 're enemies." - Steve Rogers
When characters betray each other's trust, it 's often played for drama as a stab on your back hurts. No matter the trust violates was amongst individuals, between organizations or between individuals and organizations, the relationship is often inevitably broken and seldom can heal from it. Once bitten, twice shy. It's understandable that to quite a lot people, a betrayal is a nail to the coffin. An event horizon that a relationship never can go back from. For some others, betrayals can be bygone with atonement and true remorse. But usually we don't expect it to be forgiven lightly. That's why non-canonical betrayals in fanfics can be seen as character bashing. But then it can also be seen as a good chance to test the characters and there's always canonical betrayal (actual or perceived) that the fanfic writers want or need to deal with. Sadly I don't have much experience with betrayal in fanfics, but I'd like to talk about two betrayals in canon (actual or perceived) that leads to my different response.
( Spoiler for Harrt Potter and Marvel comics: Civil Wars plot line )Question: What do you think about betrayals in canon or fanworks? How do you deal with it?