Originally Posted by
artifice
That doesn't explain his motivation behind the plan though, only that he would have no problem committing the crime. I don't doubt that he is capable of making the decision to kill the clan, what I don't understand is what was his motive for targeting them so specifically? It all made sense when we were led to believe that it was Madara behind the massacre but Obtio's only objective, from what we have seen has been to regain all he lost and prevent any future loss through the moon's eye plan. His plans, at least back then were very much simplistic and he didn't really have any good reason to target the Uchiha. It can't be a simple case of indifference because Obtio went to great lengths to insure that the clan would be destroyed utterly.
My point is not that Obito is capable of horrific acts, its that his actions seem to have exceeded the tasks set out for him by Madara and don't seem to fit with his own personal agenda. Like I said, Obito showed no real interest in vengence or obtaining power for himself, the only ambition he expressed was the completion of the Moon's Eye Plan. I can see why he attacked Konoha, because he needed to acquire the Kyuubi and get Minato out of the way but going after the Uchiha clan seems relatively unrealated to his objective. In fact, the village had already begun to suspect the Uchiha of insurrection so leaving them to their own devices would have inevitably resulted in a war which probably would have helped speed up his goals. Obito even said that he put off his plans to attack Konoha because Itachi was in his way, yet based on what we have seen if Obito had just stayed away from the Uchiha Itachi may not have even found out about his plans and would have been far less of a threat.
There must be a good reason for why Obito targetted the Uchiha, why he became involved with Itachi, and most of all, why he considers Sasuke so important. Even black Zetsu seemed to be unaware of Obito's plans because he was also surprised when Itachi died, that means that Obito knew things about Itachi that he wasn't sharing with Zetsu. It seems that Obito would keep Madara's representative in the dark about any part of his plan. Could Obito be trying to double cross Madara and complete the Moon's Eye Plan without him by using Sasuke to obtain the Rinnegan? Even that seems unlikely though because Obito eventually obtained Nagato's Rinnegan and even after that he insisted on Sasuke's importance to the plan.