Those are just filler episodes.
Then clearly this thread is not for you.
I know that. I meant like how Osama was seen as a threat to the world and how Madara was seen as a threat to the world. And how Osama's body was disposed of and Madara's body was studied and not disposed of. Maybe it's a bad example.
It's clear that at some point Tobirama stopped studying and never bothered to cremate that boy or check on it. Because i'm positive a bunshin cant trick people for long.
Tobirama shouldn't of even tried to study that particular body in the 1st place. It's not like he found out any counter to sharingan because of it. he only figured out how sharingan progresses.
And maybe he did find something? lol. We don't know ;p.
Also, how do we know Madara's hidden at a secured place where no one could get in from the outside?
But the "not burning of the body" is not the same not as listening to the advice of your teacher...
That one uchiha? obitio told sasuke about it after Itachi death. Name is Setsuna Uchiha
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Ah but we don't know how he died. And also, he had something against the Senju clan... However, we know for a fact, the Senju clan (the clan, not the founding members who happened to have led the clan in the past) didn't even stay as a clan after the creation of the village.
Furthermore, he was fed up by the suspicion of Tobirama.. not by tobirama's physical actions to the uchiha. Tobirama however, already state he wasn't suspicious of just the uchiha... but others also.