He has lost his temper once in canon that was not about Sasuke being harmed
[[ He lost his temper at Yashiro and his buddies because they were giving him shit about the Uchiha this and the Uchiha that, and as someone who’d dealt with their verbal abuse since his time as a genin, he’d had enough. That is one, singular example, with a clear buildup to the boiling over of emotions.
and he himself hurt Sasuke without losing his cool,
Because he was doing it. He saw it as a necessary evil. Itachi did it to get Sasuke to hate him and want to kill him. I don’t agree with the logic himself but there’s something about him personally doing the damage VS someone else.
dealt with Orochimaru (who was a risk to Sasuke and likely did harm him in some way)
Orochimaru wasn’t….literally trying to kill Sasuke. Some of the stuff Orochimaru did Itachi had no real control over (the forest of death) and he had faith that Sasuke would win because Itachi dealt with Orochimaru when he was a thirteen year old. As for during their fight, he had a plan for sealing Orochimaru and weng through with it.
I’ll say it again…if you want him to snap, kill Sasuke. That’s his reason to live.
That is when he will snap. ]]





