Knowing the truth of the Uchiha massacre was part of the reason Naruto felt he understood Sasuke. Everything else that had happened to him, his lonely childhood up to the death of Jiraiya and beyond and that need for revenge that burned so bright for a short amount of time, was the other part. Up to that point Jiraiya had been the closest thing to a father Naruto had ever had. Naruto's path could have been the same as Sasuke's when he confronted Nagato.

He listened to Sasuke's reasoning for why the truth of the Uchiha massacre had to be told and knew Sasuke had a point about it. People couldn't change if they didn't know the truth, and sometimes being shocked into action was the best way for that change to come about. Naruto also knew that he couldn't be the one to tell it.

"I gave my word to Itachi, and I can't break my word, y'know," he finally replied after a bit of silence and looking out over the ocean, "but it's your family anyways. If anybody's gonna make people understand it, it should be you. Besides, you know I've got always got your back."