The theme of justice might be present as well. If 'kina' is something evil or causing harm in the fanfic, Naruto's destruction of it can be seen as an act of justice. Also, the fanfic could explore the theme of sacrifice. Naruto might have to sacrifice something, like his time, energy or even relationships to be able to destroy 'kina' successfully.
The 'naruto destroys kina fanfic' could be centered around Naruto's growth as a ninja. Maybe 'kina' is a new threat that has emerged in the Naruto world. Naruto, being the protagonist, decides to take matters into his own hands and destroy 'kina'. This could involve battles, strategic planning, and the use of his ninja abilities. The fanfic might also explore Naruto's internal struggles during this process, like his doubts, fears, and how he overcomes them to achieve his goal of destroying 'kina'.
Yes, there might be such fanfics out there. In the Naruto fandom, with a large number of fans creating various types of stories, it's possible that some would write a story where Naruto destroys Sasuke in a way that could be seen as Sasuke - bashing. However, these kinds of fanfics may not be in line with the overall spirit of the original work which focuses on their complex relationship and growth.
Sasuke might be able to stop Naruto. They have a long - standing relationship and Sasuke has always been Naruto's equal in terms of power. He could use his Sharingan to try and break whatever is controlling Naruto or just fight him head - on and appeal to their old friendship.
It could be an organization similar to the Akatsuki, but with a different goal. Instead of collecting tailed beasts, they are focused on conquering villages. Their army would be made up of powerful and diverse fighters, and Naruto would have to face their leader, who has some sort of special power or ability that makes them a formidable foe.
It could be that Naruto is possessed by an evil spirit. This spirit wants to destroy the Leaf Village for its own reasons. Naruto, under its control, would first cut off the village's supply lines, making it difficult for the villagers to get food and resources. Then, he'd start attacking the ninja in the village one by one. He might even use his Nine - Tails chakra in a very destructive way, not caring about the harm it would cause to the place he once called home.
In a 'naruto destroys konoha fanfic', one possible plot could be that Naruto is pushed to the edge by the villagers' constant mistreatment and the hidden secrets of Konoha's leadership. He discovers some dark deeds that the village elders have been involved in, like using him as a pawn without his knowledge. This betrayal could fuel his anger and lead him to decide to take revenge on Konoha.
Since I'm not familiar with this particular fanfic, I can't give a proper summary. But if we think about it, in the Naruto universe, Naruto is a very powerful character. If he is to 'destroy' Kiba in a fanfic, it might be related to their rivalry. Maybe it's about Naruto proving his superiority in a mission or a battle within the story of the fanfic. It could also be a more complex plot where Naruto's actions towards Kiba have far - reaching consequences for the whole ninja village or their group of friends.
Some secret organizations that have been manipulating bloodline abilities for their own gain could also be the antagonists. They would not want Naruto to disrupt their plans. They might send their most powerful agents to stop Naruto, leading to intense battles in the fanfic.