Whether it is or isn't is irrelevant. There is no justification that excuses action in this regard.
（ sasuke became what itachi made him — an avenger, cruel and angry and proud. he was the one who stamped out his brother's kindness and wide-eyed wonder at the world, who sundered his gentle nature and branded him with the uchiha's longstanding curse of hatred. yet... the longer he is here, the more he sees of other realms, and of people that have never been touched by the nature of a shinobi's life, the more he realizes that of all the things his brother could and should never condone of him, this act of love is one. not the cruelest or greatest sin he has committed by far, but still: unconscionable. the boy he tortured in the uchiha compound, the one he halfly raised, the one who used to hide stray coins and shiny rocks around his room like a treasure hunt and who used to sit on the engawa of their house with an ice cream for him, melting in the late day sun when he returned from missions — that boy would never wish for him to harm others to change his fate.
is it even his right, to want it changed? it is not his life, but sasuke's that matters — since the moment the boy was born, his life was all that mattered. whatever else happens as a consequence of his regret, the man itachi has become will not live to see it. the itachi that will be given a second chance is one who has never raised a hand to his kin, altogether worthier of a chance he himself does not deserve. he will wish that other version of himself the best of the world, because he recognizes now that his younger self deserved kindness he could ill afford then, but he cannot be him. ）
Even if that were the case, what good would knowing do you?
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（ sasuke became what itachi made him — an avenger, cruel and angry and proud. he was the one who stamped out his brother's kindness and wide-eyed wonder at the world, who sundered his gentle nature and branded him with the uchiha's longstanding curse of hatred. yet... the longer he is here, the more he sees of other realms, and of people that have never been touched by the nature of a shinobi's life, the more he realizes that of all the things his brother could and should never condone of him, this act of love is one. not the cruelest or greatest sin he has committed by far, but still: unconscionable. the boy he tortured in the uchiha compound, the one he halfly raised, the one who used to hide stray coins and shiny rocks around his room like a treasure hunt and who used to sit on the engawa of their house with an ice cream for him, melting in the late day sun when he returned from missions — that boy would never wish for him to harm others to change his fate.
is it even his right, to want it changed? it is not his life, but sasuke's that matters — since the moment the boy was born, his life was all that mattered. whatever else happens as a consequence of his regret, the man itachi has become will not live to see it. the itachi that will be given a second chance is one who has never raised a hand to his kin, altogether worthier of a chance he himself does not deserve. he will wish that other version of himself the best of the world, because he recognizes now that his younger self deserved kindness he could ill afford then, but he cannot be him. ）
Even if that were the case, what good would knowing do you?