Sasuke would most likely side with Naruto. Despite their past differences, they have a deep bond. Sasuke would not let Kakashi harm Naruto without understanding the situation fully. He would step in to protect Naruto and demand an explanation from Kakashi.
In this alternate scenario, it could lead to a lot of tension and conflict within the team. Naruto might be less inclined to follow Kakashi's lead and could even try to train on his own, causing problems for the group's dynamics.
Kakashi could be initially shocked. He might not have expected Naruto to have such feelings towards him. But being Kakashi, he would probably handle it in a calm and collected manner.
He might be initially shocked. Since he sees himself as a good mentor, hearing such a harsh accusation from Naruto could leave him speechless for a moment.
Dillon hit a low point in his career, but John Woo rediscovered his potential and cast him as a complicated gangster boss. John Woo's choice and trust allowed Di Long to regain his self-confidence. Therefore, it can be said that John Woo saved Di Long.
Well, one similarity could be their determination. In the fanfic, like in the original series, both Naruto and Kakashi are very determined. Naruto is always striving to become Hokage and Kakashi has his own goals and missions he's dedicated to. They also might share similar combat styles in the fanfic, perhaps Naruto starts to adopt some of Kakashi's strategic thinking during battles.
Sasuke could be a popular character. He might be involved in the story in a way that either helps or hinders the situation where Naruto hurts Kakashi. For example, if Sasuke tries to stop Naruto from doing something stupid that would hurt Kakashi.
Another reason could be related to Kakashi's past actions. If there are some secrets or things Kakashi did in the past that come to light and Naruto doesn't like them, he could snap at Kakashi. Naruto has a strong sense of justice and loyalty, so if he feels betrayed or misled by Kakashi, his reaction could be to snap.
One possible reason could be that Kakashi is preoccupied with other important matters in the village. Maybe he has some top - secret missions or tasks assigned by the Hokage that demand his full attention, leaving him with little time to focus on Naruto.