There might be some very strange or edgy 'naruto and sasuke kill sakura fanfic' in the depths of the internet. But it goes against the essence of the characters. Naruto is all about protecting his friends and Sasuke, while he has his dark moments, still has a connection to Sakura. This kind of fanfic could be a result of someone wanting to shock the readers or explore a really twisted 'what - if' scenario that has no basis in the normal Naruto storyline.
In the Naruto fandom, such a fanfic would be very out of character for both Naruto and Sasuke. They are comrades and friends with Sakura. However, some dark or AU (Alternate Universe) fanfics might explore extreme and unorthodox ideas. But in the main canon, they would never do this as they have a deep bond with Sakura. Naruto has been friends with her since childhood and Sasuke, despite his aloofness, also values her in his own way.
In some fanfiction, it could be related to a misinterpretation of character relationships. Maybe the author has a skewed view of Naruto and Sakura's dynamic and decides to create a tragic and unexpected turn of events where Naruto kills Sakura to show the breakdown of their bond.
Well, Naruto has a very warm and persistent personality. He's always there for his friends, and he has a big heart. In fanfiction, Sakura might see these qualities in Naruto and realize his true value. He's the kind of person who can make her laugh and feel safe, which could be very appealing compared to Sasuke's more brooding nature.
In some fanfics, Sakura might avoid Sasuke because she's tired of his cold and distant attitude. She wants to surround herself with people who actually care about her and value her, so she chooses to stay away from Sasuke to find more positive relationships.
Well, in the Naruto series, Sakura has a strong connection to Sasuke. Fanfiction writers create 'sakura dies for sasuke' stories to add a new dimension to their relationship. It could be a way to show how far Sakura would go for Sasuke, highlighting her loyalty and love. Also, it might be used to create a more tragic or angsty storyline, which some readers really enjoy as it adds more drama to the existing Naruto narrative.
Sasuke could be sick of it because he values Naruto's strength and potential. He knows that Naruto is important for their village and for their future battles. Sakura hitting Naruto could potentially harm Naruto physically or mentally, which Sasuke doesn't want as it could affect their overall power balance and the future of the village.
Sakura's ability to forgive and still care for Sasuke despite his past actions could also make him proud. In many fanfictions, she represents unconditional love. This selfless love and her ability to see the good in him, even when he was at his worst, could make Sasuke proud of her as a person.
He might be jealous because he secretly loves her. He doesn't want to see her with other people.
Well, it could be due to his dark past. Sasuke has been through a lot and sometimes in fanfics, that pent - up anger and trauma might make him lash out at Sakura. He might see her as an easy target because she's so close to him.
One reason is to add some drama. In the Naruto story, Sakura and Naruto have a long - standing relationship. A slap can create an instant moment of tension. It can also be a way to show Sakura's strong personality. She's not one to hold back her emotions, and a slap can be a very physical way of expressing her feelings, whether it's anger or frustration.
If in a Sasuke fanfic, one possible reason could be unrequited love. If Sakura feels that Sasuke will never return her love and she has exhausted all hope, she might sink into despair. Another reason could be if she feels she has failed Sasuke in some way, like not being able to protect him or help him in his goals. Maybe she blames herself for his continued pain or suffering and sees no way out but to end her own life.