Naruto could develop a sense of guilt and isolation. Since Itachi was a well - known figure, Naruto might face criticism or be shunned by some for killing him. This would force him to re - evaluate his relationships and his place in the ninja world. He might have to struggle to prove that his actions were for the greater good and find new allies who understand his motives.
Sure. Itachi's saving of Sasuke was a crucial moment in the manga. It was tied to his hidden motives and sacrifices for the greater good of the ninja world and Sasuke's future.