Even though he apologized to Karin, with Naruto actions will speak louder than words. He will apologize if he feels he was wrong, but most likely not by saying it.
He was just annoyed by Naruto's chakra, you think? He will not destroy Konoha, however..
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Kishi's keeps changing his attitude all the time...True, it's different, they settle their problems by fighting, a true rivalry between Senju and Uchiha, I just don't know, according to Naruto they will both die if they ever fight again.