We don't really know a lot about obito who his parents were. What were they like maybe the uchiha rebellion started further back then we know maybe. were his parents apart of the underground. second who dont know who mardaras decedents were obito could as well be mardras bloodline. so that why hes so powerful and easily adept and learn all these Justus at a young age. also could explain how they know each other. also explains why besides rin dying it was easy for him to turn also to bring her back and live in his way of peace with the moons eye plan. so theres a lot of backstory we don't know lets just sit back and watch the show and enjoy.
