In the beggining of shippuden Sasuke tried to kill naruto. I didn't care why at the time. Looking back though was Sasukes motive to gain MS? If so does that still mean he cared about team 7 and his friendship with Naruto? I find that hard to believe Sasuke was completely indifferent during his time as hebi Sasuke. Still though Sasuke doesn't do things without motives and he wasn't completely evil at that point and was still against uneducated killing as he refused to kill even one of Orochimarus henchmen during training.