In some fanfiction concepts, it could be related to a prophecy or a dark secret. Maybe there's a hidden prophecy that says Naruto must defeat Kushina for some greater good, and he is forced to act against his own will. Or there's a dark secret in the Uzumaki family that makes Naruto believe attacking Kushina is the only way to save the world. However, these are all very out - of - the - box and often controversial ideas in the context of the Naruto universe.
Perhaps there's a time - travel element involved. Naruto from the future, who has been through some horrible experiences, travels back in time and, in a state of confusion or rage, attacks Kushina. Or it could be that a powerful villain has the ability to manipulate Naruto's emotions and uses that power to make him turn on his mother. This would create a very complex and dark plotline that challenges the normal Naruto narrative.
In some fanfictions, it might be due to an alternate timeline or reality. A change in the past could lead to Kushina having different beliefs or loyalties. It could also be related to a new power or curse that affects her judgment and causes her to see Naruto as an enemy. However, this is often a very dark and dramatic turn in fanfiction stories.
Naruto would likely be deeply hurt, not just physically but also emotionally. He has always idolized his mother, so an attack from her would be a huge blow to his psyche. His trust in family and those close to him could be severely damaged.
In fanfiction, the idea of Naruto attacking Kushina is very uncharacteristic as they are mother - son. It could be a very dark or alternate universe scenario. Maybe in a plot where Naruto is mind - controlled or in a completely warped reality where family bonds are reversed.
One possible reason could be mind control. Maybe an enemy of the village found a way to manipulate Kushina's mind and make her turn against her own baby. Another reason might be a misunderstanding. For example, she could have been tricked into believing that Naruto was a threat to the village in some way.
In this fanfiction, perhaps Naruto could be under some sort of mind control. Maybe an enemy has found a way to manipulate him into attacking the Leaf. It could also be a case where Naruto is misled about the true nature of the Leaf Village, believing it has committed some great wrong that warrants his attack.
One possible plot could be that Kakashi is under a genjutsu. In this fanfiction, an enemy ninja might have cast a powerful genjutsu on Kakashi, making him see Naruto as a threat to the village. So, Kakashi attacks Naruto, but Naruto, being the understanding person he is, tries to break the genjutsu instead of fighting back right away.
One possible reason could be a misunderstanding. Maybe Naruto is somehow influenced by an enemy's jutsu that makes him see Minato as a threat. For example, if an enemy uses a genjutsu to distort Naruto's perception of his father.
One possible plot could be that they have to face challenges together in a post - war Konoha. They might work on rebuilding the village while also dealing with their new family life. Naruto, with his experience and Kushina's strong will, could make a great team in leading the village in a new direction.
In this fanfiction, the plot might involve Kushina coming back to help Naruto in his toughest battles. Maybe she uses her unique chakra abilities that Naruto has inherited to give him an edge. She could also provide emotional support, as Naruto has always longed for his mother.
One possible plot could be that Naruto somehow inherits the Rinnegan from an unexpected source and Kushina, being his mother, helps him understand and control this new power. Maybe they discover a hidden connection between the Uzumaki clan and the Rinnegan's origin, leading them on a journey to uncover secrets long lost in the ninja world.