Itachi wanted to protect sasuke for as long as he could. He knew Madara wanted him since he knew he was still alive. Thats why he implanted Amatarasu in Sasuke's eyes to go off whenever he saw him. He did not want Sasuke to attack the Village after learning the truth. He did not want him to learn the truth period. He wanted him to be the Hero that defeated him and thus planned to die at his hand.
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