[His words haven't gotten through, and he didn't expect them too. He's given no true explanation, isn't quite sure he even knows how to properly put his thoughts into words.

Obito has hurt and killed many people. In the war and with Akatsuki. He's effectively threatened their entire world, and such transactions will not be forgiven nearly as easily as his own were, as Sasuke's will probably be. And to see all that murder caused by a friend, a teammate, as someone that was supposed to help keep that loneliness away, to stand as the shining light in the darkness so he could find their way out, it must be difficult to witness. And impossible not to feel guilt.

That, and its hard to argue when he knows he's missing details, the events that made Obito fall down this path and away from Kakashi's team. But even so...]

It was a test. [The words are quiet in the wind, but there, the first he's spoken to anyone about the conversation that passed between him and his father.] The day I fell to the darkness, welcomed it. My father had set up all the events that proceeded it, watched to see how I would react.

I could blame him for all of it...but, I had a choice. To overcome it or succumb to it. It was a test, and I chose wrong.

I'm sure, whatever it was that caused it, your teammate had a choice too. That's not something you could make for him.