Well, it's possible that there is a 'Naruto is homicidal hates his family' fanfiction. If so, the plot could be set in a world where Naruto discovers some sort of dark secret about his family that he misinterprets. For example, he might find out that his father sealed a powerful and dangerous entity within him, and instead of understanding the sacrifice his father made, he sees it as an act of aggression. As a result, he starts to hate his family and becomes homicidal. But again, this is a very different Naruto from the one we love in the original work.
It can be quite divisive. Some fans might be extremely offended as Naruto is a beloved character known for his positive traits. This type of fanfiction goes against the established character arc and values. It could make some fans angry that someone would distort Naruto's character in such a way.
One possible reason could be jealousy. Maybe Naruto has some special abilities or a prophecy surrounding him that makes his family members, who might be less favored, jealous. For example, if there's a prophecy that Naruto will be the most powerful ninja in the village, his siblings or parents might envy that future for him and start to hate him out of their own insecurities.
The plot might start with Naruto gradually realizing certain things about his family that make him feel angry or betrayed. For example, he could find out about a hidden deal his family made that he doesn't agree with.
Well, one possible plot development could be that Naruto's hatred for Sakura creates a lot of tension in the story. Maybe it leads to some kind of rivalry where they constantly compete in missions or training. And Sakura's love could be unrequited at first, causing her to strive harder to prove herself to Naruto. Another development could be that the fanfiction explores the reasons behind Naruto's hatred, like some past misunderstandings that need to be resolved for them to have a normal relationship.
One possible reason could be a misunderstanding within the family. Maybe there were secrets kept from him that made him feel betrayed. As for Konoha, perhaps he felt ostracized or not fully accepted by the village despite his efforts, which led to his hatred.
Perhaps Naruto gets corrupted by some dark force. It changes his personality completely. He might start seeing all the people in the Hidden Leaf Village as the source of his problems. He could remember all the times he was ostracized as a child and now blames everyone for it. So in the fanfic, his hatred for everyone grows as he views the world in a new, darker light.
A potential plot twist could be that Naruto's hatred is actually a cover - up for his love. He might be pretending to hate Konoha and his family to protect them from a greater threat. Maybe there's an enemy who would target them if Naruto showed any affection, so he creates this false front of hatred.
It could also be due to some external influence. Perhaps an enemy manipulated Naruto's mind in the fanfiction, making him see his family in a negative light. This enemy might have used some form of mind - control or false memories to turn Naruto against his family.
One possible reason could be feeling neglected. Maybe his family was always preoccupied with other matters, like protecting the village, and didn't give him enough attention. So he grew to resent them.
One reason could be that it goes against the core themes of Naruto's character development. Naruto was always longing for family and his journey was about finding his place in the world which included his family roots. Fanfiction that has him hating family might seem out of character.