The Naruto Manga chapter 608 is already released online. This chapter revealed that Kakashi learned to protect his friends from Obito.
It can be recalled that when Kakashi and Obito were still teammates, Kakashi was strict on following the village’s policies especially in achieving the team’s goal on a mission. Kakashi considered those shinobis who abandoned their teammates for the sake of the success of their mission as trash, just like what his father who was known as the White Fang did.
Obito rejected Kakashi thought about becoming trash. For Obito, Shinobis who don’t care about their comrades were far way worst than trash.
Obito thought that Kakashi’s stand was the real cause why Rin died. He thought that Kakashi allowed their enemies to kill Rin.
Now, with the Naruto manga chapter 608, Kakashi showed Obito that he learned a lot from him… that … He would protect Naruto.