Well, it could be many reasons. Maybe there was a misunderstanding. Some dark magic might have been used to make his friends think he did something bad. Or perhaps a powerful enemy framed him by planting false evidence. It's hard to say exactly without more context from the fanfiction.
Yes, there are quite a few fanfictions with the concept of Harry and Draco being mates. In the world of fanfiction, writers often explore different relationship dynamics between characters that deviate from the original canon. This can lead to some really interesting stories where Harry and Draco form an unexpected bond, whether it's a friendship, a more complex relationship, or a new kind of magical connection.
Maybe Harry has seen a different side of Draco that others haven't. He could have realized that Draco was just a product of his upbringing and the difficult situation he was in.
Maybe in some fanfictions, Draco is driven by a sense of self - preservation. He might believe that Harry will eventually turn against him or the Slytherin house. He could think that by killing Harry, he can secure his own place at Hogwarts and in the wizarding community. Additionally, it could be part of a larger plot by Voldemort or his followers. If Draco is forced to join Voldemort's side, he may be given the task of killing Harry to prove his loyalty.
They're popular because it's a twist on the normal Harry Potter story. People like seeing the hero in a different situation, like being betrayed. It adds drama.
Well, in 'harry betrayed by the light fanfiction', it could be that the so - called good guys, who are associated with the light, have their own agendas. Maybe they sacrifice Harry's well - being or safety for the greater good as they perceive it. For example, they might make decisions without his consent that put him in danger, making Harry feel betrayed. It could also be about secrets being kept from him that, when revealed, make him feel like he can't trust those he thought were on his side.
In fanfiction, the 'betrayal by friends' trope often serves to create drama and character development. For Harry, it could be a shattering experience. However, it also opens the door for new alliances, like with Draco. Draco, who might have his own complex reasons, could see this as an opportunity to show a different side of himself to Harry. It could be a journey of redemption for Draco and a path of self - discovery for Harry.
It's difficult to say for certain if there are popular 'harry betrayed fanfiction' stories. Some fanfictions gain popularity based on how well - written and unique their concepts are. Since the idea of Harry betraying someone or something is a departure from the traditional Harry Potter narrative, it might not be as mainstream. But within the fanfiction community, which is full of diverse and creative interpretations, there could very well be some stories that have a following, though they may not be widely known outside of that specific community.
It could imply that in some fan - created stories about Harry (presumably Harry Potter), the character of Harry has been depicted as betraying someone or something. Maybe he betrays his friends' trust, or goes against the values he's supposed to uphold in the fanfiction world.