One reason could be that some fans want to explore different character dynamics. The original Bella - Edward relationship is so well - known and often idealized, so making Bella hate Edward creates a whole new set of tensions and story possibilities.
Another factor could be that different readers have different interpretations of the characters. Maybe some fans saw certain actions or traits of Edward that they thought Bella should dislike. So they create fanfics to explore that idea. It's a way for fans to put their own spin on the story and the characters, to make them more relatable or to suit their own tastes. Also, it can add a sense of realism as in real life, relationships are not always perfect and love can turn to hate under certain circumstances.
One possible reason could be that some fans want to explore a different dynamic. In the original story, Edward and Bella are in love, but in this fanfiction, perhaps the writer wants to show a more complex relationship where Edward hates Bella. Maybe it's to add more drama or to explore an alternative storyline that goes against the typical romance.
Perhaps there are some who have a darker side to their creativity and don't fully consider the implications of writing about abuse. But this kind of fanfiction should not be encouraged as it goes against the positive nature that most fanfiction communities strive for.
Some writers might create 'Edward is abusive to Bella' fanfiction to explore the darker side of human nature and relationships. They want to see how the story would unfold if the relationship had a negative turn.
One reason could be a desire for a more edgy or non - traditional take on the popular Edward and Bella relationship. Some people might want to explore a darker side of their dynamic that goes against the typical romantic narrative.
One reason could be for shock value. Writers might want to create something completely different from the normal, loving relationship in the Twilight series to get a strong reaction from readers. Another possibility is that they want to explore the darker sides of the characters, pushing the boundaries of what we know about Bella and Edward.
It could be that a very small number of people have a warped view of the characters. Instead of seeing the love and positive aspects of Edward and Bella's relationship, they want to explore a negative and inappropriate side for some strange or deviant reasons. However, this is not in line with the general perception of the story and its characters.
It could be a form of creative but very extreme deviation. Maybe the author was trying to explore gender - bending concepts in a really radical way, but this is a very extreme take on it. However, it's still not in line with the general spirit of the 'Twilight' series. In a more general sense, some fans might just be experimenting with ideas without fully considering the implications or the respect for the original work.
One possible reason could be Edward's fear for Bella's safety. In the Twilight universe, Bella is constantly in danger because of her relationship with Edward. This overbearing worry might lead to arguments and ultimately a break - up. Another reason could be Bella's desire for a more normal life. Edward's vampire world is full of secrecy and danger, and she might feel exhausted from it.
One possible reason could be Bella's discovery of a dark secret in Edward's past that she can't overlook. For example, if she found out he had been involved in something unethical long ago. Another reason might be differences in their future plans. Maybe Bella wants to live a normal human life for a while longer, while Edward is eager to turn her into a vampire immediately. Also, external pressure from other vampire clans could force them apart, as they might not approve of their relationship and create situations that drive a wedge between them.
One reason could be loyalty. Emmett is part of the Cullen family, and Bella is important to Edward, who is also his family. So, he would do anything to protect her for the sake of family unity. Another reason might be his sense of justice. If he saw Bella in an unfair or life - threatening situation, his nature would drive him to save her.