Some villagers might be in awe of his new strength and abilities. They could see him as a great protector now. However, there may also be those who are still skeptical or even afraid because of his past as the container of the Nine - Tails. His friends would likely be overjoyed to see him back and eager to train with him or learn from him.
The older characters such as Kakashi would be cautious. They would recognize Naruto but also be worried about the implications of someone from the future being in the present. They would want to know if his presence could change the future in a negative way. For example, they might fear that his actions could lead to the earlier awakening of a powerful enemy. As for the villains, they might see future Naruto as a threat and try to eliminate him as soon as possible. Orochimaru, for instance, would be very interested in Naruto's future powers and might try to capture him to study. And the new generation of ninja in the past would look up to future Naruto, seeing him as a symbol of what they could become.
Naruto might react with confusion at first. He has always wanted to be accepted by the villagers, so being attacked is the opposite of what he expected.
At first, Naruto might be confused and hurt. He has always wanted to be accepted by the villagers, so being beaten by them would be a huge blow. He could become angry and vow to prove himself to them.
Naruto would probably be conflicted. On one hand, he has a deep love for Konoha, his home. But on the other hand, he might have been hurt by the past events that led to his departure. He could initially be hesitant, but eventually be swayed by the thought of seeing his friends again.
He would probably be very angry. Naruto has always been a free - spirited person, and being experimented on against his will would be a huge violation of his rights. He might initially try to resist physically, but as the situation gets more complex, he could start to plot his escape and revenge.
He might initially try to prove his innocence. He'll gather evidence or find people who can vouch for him. But as the situation worsens, he could become angry and more determined to find out the truth and expose those who are behind his false accusation. He might even leave Konoha to seek answers and allies elsewhere.
At first, Naruto is likely to be heartbroken. Konoha has been his home, and he has always longed for acceptance from the villagers. So being abandoned would be a huge blow to him.