One possible reason could be Hinata's unwavering loyalty. Throughout the series, Hinata has always been there for Naruto, believing in him even when others didn't. In contrast, Sakura was often more focused on Sasuke. So Naruto might see Hinata as someone who truly understands and supports him.
Well, Hinata is very kind - hearted. She has a gentle nature that might attract Naruto. In the fanfiction, perhaps Naruto realizes that Sakura's feelings for him are more of friendship over time, while Hinata's love for him is pure and deep. He may be drawn to Hinata's selfless love and her ability to see the good in him without any conditions.
One reason could be their long - standing feelings for Naruto. They both care about him deeply, and in fanfiction, this can lead to intense rivalry. Sakura may feel that she has known Naruto longer and has a stronger claim. Hinata, on the other hand, has her own deep, unspoken love for Naruto that she might be more willing to fight for. Another reason could be their own insecurities. Sakura might be insecure about Hinata's gentle and kind nature that Naruto seems to like. Hinata could be insecure about Sakura's strength and her history with Naruto.
It could potentially improve their relationship. Since Naruto is not involved with Sakura, there's no love triangle tension between them regarding Sakura. This might allow Naruto and Sasuke to focus more on their own friendship and mutual respect.
Some people might write it because they prefer other characters over Naruto, Hinata, and Sakura. They could be trying to promote their favorite characters by putting these three down in their fanfiction.
Perhaps Naruto sees Ino's growth potential more clearly. Ino has been working hard to improve herself, and Naruto might recognize that. In contrast, Sakura's focus on Sasuke sometimes overshadows her own growth. Naruto might choose Ino because he wants to support someone who is more focused on their own self - improvement and is also able to contribute more effectively to the team.
In the fanfiction, Sakura could be jealous because she has an ego. She might have thought that Naruto would always be there waiting for her. But when he falls for Hinata, it bruises her ego. Additionally, she may have seen Naruto as her safety net, someone who would always support her no matter what. Losing that special status to Hinata makes her envious and jealous.
One reason could be envy. Maybe Naruto sees Hinata as having something he doesn't, like a more stable family situation, and he lashes out in jealousy. Another reason might be that he's just being a typical, rambunctious kid who doesn't realize the impact of his words or actions on Hinata.
One reason could be misunderstanding. Maybe Hinata sees Sakura getting too close to Naruto and misinterprets their friendship as something more. And Sakura, on the other hand, might not be fully aware of Hinata's feelings for Naruto and act in a way that Hinata perceives as a threat.
One reason could be that Naruto has always been more attracted to those who understand his outcast past better. Sakura doesn't really have that kind of connection with him as she comes from a more normal background. So there's a lack of that fundamental understanding between them which hinders any romantic feelings.
It could also be a way for some fans to explore alternative relationship dynamics. Maybe they were not fully satisfied with how the relationships in the original Naruto story developed. For example, they might have always thought there was some unspoken tension between Naruto and Sakura that could have led to something more, and this is their way of exploring that idea in a fictional and extreme way. However, this does not justify the unfaithful nature of the plot.
One possible reason could be a huge misunderstanding. Maybe he thought Hinata did something really bad to his friends, like unknowingly leading the enemy to them. Without knowing the truth, his hot - headed nature made him lash out.