We knew the reason why Sasuke left Konoha and his friends. He wants revenge and wants to kill his brother. It was his ultimate goal, but when he succeeded, it seems he wanted more.

He talked with Madara, about so many things. About his clan and about Itachi. It seems he believed so much about the things Madara said and now he has his another goal. It’s to destroy Konoha, little by little.

On the other side, Naruto still believes he can bring Sasuke back. From the time Sasuke left, Naruto never stopped or even thought about stopping. He has a promise and he’s mission is to make it happen. But like I said, what if it’s already written? What if Sasuke is really an enemy, destined by fate.

It sounds weird, but it makes sense. With the current happening in the manga, it looks like Sasuke is not stopping, not even thinking about what he was before. He’s continuously attacking Konoha. He’s initial goal is destroy Danzo, which I strongly believe is one of the things Madara revealed to him before. There’s no reason for Sasuke to just develop hate to Danzo while he doesn’t have any information about him. And while Sasuke is on his new mission, he doesn’t look like he knows his old friends anymore. All that’s left is the hatred he has in himself.