Well, one reason could be that Sakura is often written as being too pushy towards Naruto in fanfiction. He might get tired of her always trying to boss him around or control his actions.
Another aspect could be that Naruto has his own growth and development in the fanfiction. He may have outgrown the relationship dynamics he had with Sakura. Maybe he realizes that he wants different things in life or in relationships, and Sakura's presence in the fanfiction no longer aligns with his new self - discovery.
In some fanfictions, Sakura might be overly emotional and Naruto could have had enough of dealing with her constant mood swings. Also, if the fanfiction portrays Sakura as not respecting Naruto's goals and dreams, that could be a reason. For example, if she keeps trying to make him abandon his ninja way for her own desires, it would be understandable for Naruto to reach his limit with her.
Perhaps Naruto has grown weary of the excessive focus on Sakura in fanfiction. He might feel that other aspects of his life and the world around him are being overlooked. His own growth, his relationships with other characters like Sasuke, or his dreams for the village are not given as much attention as they should be in these fan - created stories. So, he's had enough.
It could be that the fanfiction often puts Kakashi in situations that Naruto doesn't think are appropriate. For example, if the fanfiction makes Kakashi act out of character in terms of his loyalty or his ninja values. Naruto, who has a deep bond with Kakashi, might not like seeing his mentor misrepresented in such ways.
One reason could be that the fanfiction might have misrepresented Naruto's character. He's a complex character with strong values, and if the fanfiction twisted those, he'd have enough. For example, if it made him out to be too subservient to Konoha when he's always fought for change within the village.
One possible reason could be that Sakura realizes she has different goals or values that are not compatible with being around Naruto. Maybe she discovers a new path in life that doesn't involve him, such as focusing on her own medical ninja career without Naruto's chaotic lifestyle interfering.
Perhaps there was some sort of dark influence at play. In the world of Naruto, there are often dark forces and genjutsu (illusion techniques). It's possible that Naruto was under the influence of a genjutsu that made him see Sakura as a threat, so he punched her in self - defense without realizing it was an illusion.
Another reason might be related to the events that unfold after the rejection. For example, Naruto might go on to do extraordinary things and form closer bonds with other characters. Sakura could feel left out or jealous, which then leads to her regret. Also, she might have some self - realization about her own feelings at the time of rejection, thinking that she was influenced by wrong factors like social status or her own naivete.
One possible reason could be that Naruto's character development leads him to focus more on other aspects like his ninja duties or his bond with other friends. As he grows, his priorities shift.
Perhaps it's a training exercise that gets out of hand. In the world of Naruto, intense training often mimics real battles. If they were sparring and emotions ran high, it could turn into a full - fledged fight. Also, Sakura might be trying to prove herself to Naruto, and Naruto, not understanding her intentions, might respond aggressively.
One reason could be that in some fanfictions, Dumbledore's character might be over - idealized or his actions overly scrutinized in ways that make Harry seem secondary. Harry might be tired of always being in Dumbledore's shadow or having Dumbledore's decisions dictating his life even in the fan - created stories.
There might be some 'naruto is killed by sakura fanfiction' out there. One possible reason could be to explore a dark and alternative storyline. Maybe in that fanfiction, Sakura has been corrupted or misdirected in some way, perhaps by an evil force that makes her turn on Naruto. Another reason could be to create a high - impact, emotional story where the death of a main character like Naruto at the hands of someone close shakes up the entire Naruto -verse in that fan - created narrative.