Does itachi care about Sasuke?
After the Uchiha were eliminated, Itachi, tormented by his
actions, could not bring himself to kill Sasuke
He made himself out as a villain so that Sasuke would someday kill
him to avenge their family. To keep Sasuke safe until then, Itachi
threatened to share everything he knew about Konoha with its
enemies if the village ever harmed Sasuke.