On the other hand, it could bring Harry closer to some characters who also have doubts about McGonagall in the fanfiction. They might form a sort of alliance based on their shared suspicion, which could lead to new storylines and developments in the fanfiction.
McGonagall might notice Harry's distrust and feel hurt or frustrated. She may try to figure out what went wrong but find it difficult as Harry is not forthcoming. Their interactions become less warm and more formal. For example, in class, Harry may be less likely to ask for help from McGonagall, and McGonagall may be more strict with Harry as she doesn't understand his change in attitude.
Well, it could show that Harry gravitates towards the younger characters because they are more innocent and less likely to have ulterior motives like the adults. He may start to build a sort of 'youth alliance' in the fanfiction. They would support each other and rely on one another more than on the adults. Harry could be teaching them magic in a different way, a way that is not influenced by the adults' traditional methods, which he may distrust.
It could also be due to some actions of McGonagall that seemed suspicious to Harry. Perhaps she made a decision regarding Hogwarts or Harry's safety that Harry didn't fully understand at the time. In the complex world of the wizarding school, decisions are often made with many factors in mind, but Harry might not be aware of all of them, leading to his distrust.
Well, it might make Harry more isolated. In the original story, Dumbledore was like a guiding figure for Harry. If Harry doesn't trust him in the fanfic, he may not trust the advice Dumbledore gives about other characters either. So he might be more cautious around people Dumbledore was friendly with, like Hagrid. He might think they are also in on Dumbledore's secrets and not be as open with them.
His friends might be divided in their opinions. Some of them might still trust Dumbledore wholeheartedly and think Harry is overreacting. This could lead to arguments and a strain in their relationships.
They could work together on a difficult task. By collaborating and seeing each other's skills and good intentions in action, Harry can regain his trust in Hermione. For instance, if they are in a dangerous situation and Hermione comes up with a clever plan that saves them both.
Well, it would also affect the relationships of other characters. For example, his friends in Konoha would either try to regain his trust or they might side with Konoha against him. This would add a whole new layer of complexity to the plot as characters are forced to take sides and deal with the consequences.
It could also be that in the fanfiction, McGonagall has shown some form of bias. Maybe she seems to favor certain students or groups over others, and Harry, being the one who always stands up for fairness, starts to distrust her when he notices this behavior. He might feel that she is not as just as he once thought her to be.
It changes the dynamic between Naruto and the village. Since Sarutobi was an important figure in the village, Naruto's distrust can create a rift not just between them but also between Naruto and the traditional village values Sarutobi represented.
It could make their relationship extremely hostile. Snape would likely be very angry at Harry for destroying something related to him, which would further strain their already tense relationship.