That's the point of his bond with Naruto. He's always had an impact on him, which is why he wants to kill him: He knows that his influence could be what holds him back from his pragmatic and independent way of doing things. Naruto has stuck with him, so the only way he can move forward without restraint is to sever their bond, which is effectively the last one he has. It's actually kind of sad.
That's not really my point. Sasuke was the most pure during the second half of the chunnin exam, he was willing to sacrifice his life, his hatred and even give up on his quest for vengeance for the sake of his comrades and even went out of his way to take hits for Naruto in the fight with Gaara....if that Sasuke turned into this Sasuke who was able to attempt murder on this friends of his without even flinching....whats stopping him from becoming evil again?
Sasuke is literally the most fickle character in the series. His entire existence puts the ninja world at risk.