On the other hand, Naruto could feel really hurt. Since he has always desired acceptance, Sarutobi's hatred could be a big blow to his self - esteem. He might withdraw a bit, become more introspective, and question his own worth. But eventually, he would likely try to overcome these feelings and face the situation head - on.
Naruto might initially be confused. He has always looked up to Sarutobi as a respected elder, so being hated by him would be unexpected. He would probably try to find out why Sarutobi hates him. For example, he might go to Sarutobi and ask directly, hoping for an explanation.
Naruto could also get really sad and start to doubt himself. He might think that he did something terribly wrong, even if he didn't. And he may try to change himself to win back their friendship, like suppressing his usual exuberant personality.
Naruto might initially be very confused. He has always considered Team 7 as his friends, so the sudden hatred would be hard to understand. He could try to talk to them to find out what's wrong, but they might just ignore him or be hostile.
It could also be due to a past event that Naruto unknowingly was involved in. Maybe something bad happened to Sarutobi's family or friends and he blames Naruto for it, whether it was Naruto's fault or not. For instance, if there was an attack on the village and Sarutobi lost someone close, and he wrongly believes Naruto had a part to play in it, he would start to hate Naruto.
At first, Naruto might be really confused. He's used to thinking of his friends as his support system, so when they turn on him, he doesn't understand why. He'll probably try to talk to them, to ask what he did wrong. If they don't listen, he could become really sad and withdrawn. Maybe he'll start training even harder, using the pain of being rejected by his friends as motivation to become stronger.
He could try to fight back against this hatred. Naruto has a strong will. Instead of just accepting being hated, he might try to prove everyone wrong. He could start by doing good deeds secretly or try to expose any false rumors that are causing people to hate him.
Naruto might also be determined to change his brother's mind. He would keep showing his good side, like his kindness and his strong will to protect the village. He could think that by being a better person, his brother will eventually stop hating him. He may even go through some tough training to prove himself not only to his brother but also to the whole village. And in the process, he may face a lot of difficulties and rejections from his brother, but he won't give up easily.
Naruto would probably be extremely hurt. He has always looked up to Sarutobi as a leader and a father figure. His first reaction might be disbelief, unable to accept that Sarutobi would do such a thing. Then he would likely feel a great sense of anger and betrayal. He might lash out and try to prove his innocence.
In other fanfics, Naruto might try to understand Sakura's perspective. He's a very forgiving person, so he could give her the benefit of the doubt and try to figure out what made her act in a way that hurt him. He might think that she had her reasons and try to work through it with her.
Naruto would likely be extremely hurt. He trusts his friends and comrades deeply, so Anko's betrayal would be a huge blow. At first, he'd probably be in disbelief and try to talk to Anko to find out why she did it.
Naruto might be initially shocked and heartbroken. He has always considered the village his home, despite how some of the villagers have treated him. So being banished would be a huge blow to him.