One consequence could be that Naruto leaves the village. He might go on a journey alone, seeking a new purpose away from the place that has caused him so much pain. This would be a major change from his original story where he was so attached to the village.
One consequence could be that he leaves the village. He might go off on his own to find a new place where he feels accepted and can start anew.
He might become withdrawn. Instead of being the energetic and outgoing Naruto we know, he could isolate himself from his friends and the village. This would change the whole dynamic of the relationships in the fanfic.
His relationship with Jiraiya could be affected. Jiraiya has a strong connection with the toads, and if Naruto hates toads, it could create a rift between him and his mentor. This could lead to Naruto losing an important source of guidance and support in the fanfiction.
It could also lead to some division among the Naruto fandom. Those who support Sakura's view might be more critical of fanfiction, while those who love fanfiction might not like Sakura as much because of her stance. For example, in online Naruto communities, there could be debates and arguments about whether Sakura is right to hate fanfiction.
One possible consequence is that it could lead to a split in their group. If they are part of a team or a community, their animosity could cause others to take sides, creating factions.
He might avoid any events or communities related to magic fanfic. He won't be interested in reading or discussing them.
One possible consequence could be that his relationships with other characters who are related to the Uzamaki clan, like Hinata (since she marries into the Uzamaki family), become strained. It might also lead to internal conflict within himself as he battles with his own identity and heritage.
One consequence could be that the fanfirls in the fanfic might get sad or angry at being hated. They might stop supporting Naruto in the fan - created stories.
One consequence could be that it makes his character seem more aloof in the fanfic world. People might see him as unfriendly or unapproachable, which could change the way other characters interact with him.
It could also lead to a divergence from the core values of the Naruto series. The series often emphasizes family, friendship, and love in a positive way. If Naruto hates his family in fanfiction, it goes against these values and may cause some fans to be disappointed.