Okay, this make's sense. It still puzzles me why he would kill his ENTIRE clan though, and not just his father. I mean, one is better than all of them. Then he could go to the funeral, and claim he died of natural cases or whatever he comes up with, then call off the attack on Konoha. Like i have said a million times, Itachi is smart enough to come up with a plan like this. Of course one without flaws, cause im sure mine has quite a few, but you get my point right? lol.
The only thing is say to that is this. Depending on who Tobi "NO ONE" Uchiha is, depends on how the Uchiha massacre actually went.
1:Tobi is "Madara Uchiha". Would not make sense because Madara would not necessary help kill off his entire clan with Itachi, mean while helping Konoha out by stopping the Coup de tat. He would rather destroy the other group and take the village for himself.
2:Tobi is "Shisui Uchiha". Would and would not make sense. If Shisui was actually on the Uchiha side as once thought it would not make sense. If Shisui was on Itachi's(Konoha) side then it would make possible sense.
3:Tobi is "Obito Uchiha". Could easily make sense because Obito is presumed dead. This is only possible if Obito in some way formed hatred for the Uchiha clan from whatever.
4:Tobi is "Kagami Uchiha". Could easily make sense because not much is known about Kagami. He is in the same generation of the "elders" who we know had a hand in it, and he is presumed dead or MIA.
With all that said, I think Itachi could go through with it because he had wisdom. To be ruled over with power in fear is not free. So we would take the burden upon himself, die a criminal, and at the same time get rid of the possibility the elder brother would win and rule. He just couldn't kill Sasake, and maybe Sasake was in the deal.
You kill your rebellious clan, and you and your brother are saved. Or you all die including your brother. Etc.
