If Naruto's friends or loved ones are threatened by the ANBU, either directly or indirectly. For instance, if the ANBU's actions put Sakura or Kakashi in danger without just cause, Naruto would be likely to turn against them. He's very loyal to his friends, and any threat to them would be a strong motivation for him to take action against the ANBU.
Chapter 347, ""I Want to be the Eagle in the Wilderness", is the clearest early answer because it turns Eagle's situation into a concrete plot event.
Chapter 281, "Zhao Lang, Are You Willing to Take a Gamble?", is the clearest early answer because it turns Take's situation into a concrete plot event. The chapter turns that into something concrete by moving from In his dream, he found himself in a strange world.
Chapter 156, "Group Morning Run!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event.
Chapter 414, "The White Knife Goes In, The Red Knife Comes Out", is the clearest early answer because it turns Nina's situation into a concrete plot event. The chapter gives readers a real answer by opening on Third Master really lives up to his reputation; his skills are...
Chapter 609, "What identity would make the Crown Prince barbecue!", is the clearest early answer because the hidden truth stops feeling like mere subtext. The chapter gives readers a real answer by opening on Jiang Yan: "!!!" Right, the Cat and Mouse Game was over, they had...
Chapter 296, "It's Over, I've Kicked the Iron Plate!", is the clearest early answer because it turns Jiang Li Fan's situation into a concrete plot event. It opens with This grand fan meeting soon caught the attention of the entire... and closes on What's not to love about that?.
Chapter 434, "The Identity of the Feng Shui Master Can't Be Hidden Anymore", is the clearest early answer because the hidden truth stops feeling like mere subtext. A useful checkpoint is the way the scene starts with He thought Jiang Li was just talking, but to his surprise, there...
Chapter 383, "Doomsday Beehive", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li's pale fingertips rubbed against the handle of the coffee...
Chapter 289, "After all, no one else has designs on Grandpa's inheritance but me", is the clearest early answer because Jiang Li gets a payoff that changes the stakes. The chapter turns that into something concrete by moving from In the pure white room, a man lay motionless on the hospital bed,...