Kakashi's problem with Naruto?

[Abdula]

Kakashi wanted Sasuke to give up on revenge and focus on the friends he has now, and that appearence from Itachi completly warped Sasuke to a point where he attacked his friends.

You miss the point, seeing Itachi again didn't warp Sasuke, Sasuke was warped from the very beginning because of Itachi. Kakashi's and Naruto's influence on Sasuke was beginning to change that but Itachi showing up and then using his MS to make Sasuke relive the night his clan was killed over and over again just put him back where he started, and Oro used that opportunity and made everything worse.

Kakashi taught Sasuke the Chidori, then in the VotE Sasuke almost killed Naruto with the Chidori. I wonder how Kakashi felt about that?

What is your point. He is a teacher he isn't responsible for what the students choose to do with what he taught them. If he knew what was going to happen I'm pretty sure he wouldn't have taught him but the point is he didn't know. If Sarutobi had known that Oro was going to attack the village and kill him I'm sure he wouldn't have taught him. If Itachi's father knew what Itachi was going to do I'm pretty sure he wouldn't have taught him anything either.

Hell, if Einstein and the scientists who worked on The Manhattan Project knew what the outcome of their work was going to be, I'm sure they wouldn't have done it either.