One possible reason could be that the clan fears his power. In some fanfictions, Naruto's growing strength and his potential to disrupt the clan's traditional power structure might lead to his exile. They may see him as a threat to their established ways.
Another reason could be a false accusation. Maybe someone in the clan frames Naruto for a serious crime. Since he is already an outcast in the village in some ways, it's easier for the clan to believe the false story and exile him to protect their reputation.
It could also be related to a prophecy. The clan might misinterpret a prophecy that involves Naruto. They think that exiling him is the only way to avoid a disaster that they believe he will bring, not realizing that they are actually making things worse by doing so.
It could be due to a prophecy. The Uzumaki clan might have received a prophecy that Naruto would bring great turmoil or change to the clan, and rather than face the uncertainty, they chose to exile him. Some clans in the Naruto universe are very superstitious about prophecies. Also, Naruto's unruly nature as a child could have been misinterpreted. His pranks and disregard for some of the strict clan traditions might have been seen as disrespectful and a sign that he didn't belong in the Uzumaki clan, leading to his exile.
It could be related to some prophecy or superstition within the clan. They might think Naruto is a bad omen or something that goes against their traditional beliefs, so they decide to disown him.
One possible reason could be to seek greater power and training opportunities elsewhere. Maybe he feels restricted within his clan in terms of the type of jutsu he can learn or the level of training he can receive. So, he decides to leave to explore different ninja arts and grow stronger on his own terms.
In this fanfiction, Naruto could reject his clan because of the dark secrets or past actions of the clan. He is a character who values justice and friendship. If the clan has a history of wrongdoings that he discovers, he may not want to be associated with it. Also, Naruto has his own dreams and goals that might not fit within the framework of the clan. He has always been a bit of a rebel, and rejecting the clan could be his way of standing up for what he believes in.
Perhaps there were some dark secrets in his clan that he discovers. These secrets could be related to past wrongdoings, like how they treated other clans or individuals. If Naruto has a strong sense of justice, learning about these things might make him hate his clan. It could also be that he feels ostracized or different within his clan, like if he has abilities or beliefs that are not accepted by the majority of the clan members.
In the fanfiction, it could be that Naruto has had some personal negative experiences with Uchiha clan members. He might have witnessed some Uchiha using their power to bully or oppress others. Naruto, being the kind - hearted person he is, would not tolerate such behavior and thus develop a hatred for the clan as a whole. This could also be related to the Uchiha's reputation for being a bit of an outcast clan, and Naruto might see them as not fitting into the harmonious village life he envisions.
It could also be because of the Uchiha clan's perceived aloofness. The Uchiha might seem standoffish and exclusive, which could make Naruto, who values friendship and community, dislike them. They may have a reputation for being more concerned with their own clan's affairs rather than the well - being of the whole village.
Maybe the clan heads have been unkind or unfair to some of Naruto's friends or people he cares about. If they've shown discrimination or harsh treatment towards those without strong clan ties, Naruto, being empathetic, would likely develop a dislike for them.
It could also be due to a clash of personalities. The Inuzuka clan has a very distinct and often aggressive way of approaching things, with their strong bond with their ninja dogs. Naruto, with his more free - spirited and sometimes impulsive nature, might find their ways irritating and over time, this could develop into hatred.
One possible reason could be that he feels burdened by the expectations associated with the Uzumaki clan. Maybe he doesn't like the constant attention or the pressure to live up to the clan's legacy.