In the 'boruto kills naruto fanfiction', a motive could be a power struggle. Boruto might believe that Naruto's power is holding back the village's growth or his own potential. He could think that by eliminating Naruto, he can bring about a new era of power in the Hidden Leaf. Also, it could be out of desperation. If Boruto is in a situation where he believes that killing Naruto is the only way to save someone he loves, like his mother or a friend, he might take such a drastic step.
I don't think there was an Indian who tried to kill George Washington. History doesn't provide a definite record of such an occurrence. Maybe it's a less-known or unsubstantiated story that hasn't gained much attention.
He might have used a weapon like a knife. He could have planned it carefully, waited for the right moment when they were alone, and then attacked with the knife.
There could be various reasons. Maybe he had mental health problems, or there was a major conflict within the family that pushed him over the edge. Whether it's true or not, it's a disturbing thought.
Well, it's hard to pinpoint a specific one. Fanfiction is so diverse, and this kind of storyline could show up in many different works. Maybe search on popular fanfiction platforms using relevant keywords to find what you're looking for.
In fanfiction, if Naruto ate the Kage Kage no Mi, he would gain the power to control shadows. This could make his combat abilities extremely powerful. He could use shadows to trap enemies, create illusions using shadows, or even use the shadows to enhance his speed and stealth in battles. For example, he could send his shadow to scout ahead unnoticed.