In fact, if Naruto demands their apology, it'd be OOC.
To Naruto, their acceptance of him is much better than any apology. Remember Naruto's face when the entire village greeted him after the Pein Invasion Arc? That utter look of happiness that came from their welcome? He's fine with it. <- Understatement of the year....
well thats true....but deep inside naruto was feeling a little upset.
remember when the dark naruto came out and stared talking bad about the villagers saying "now they like me...when im their hero."
but really the villagers started liking naruto waaay before the ambush. they started to acknowledge him and he didnt know it. if you noticed people stopped giving him looks a LOOOOONG time ago.
he thought it was sudden but it wasnt, and realizes that. thats probably why he forgives them.