If he resurrected Rin, Madara would kill her. Obito's backtalk to Madara is "screw you, I'm doing this for me."
Kakashi... I want to build a world where heroes don't have to make pitiful excuses in front of graves.
He isn't out for revenge on Kakashi or he'd just kill him. He's sad that his friend had to go through the horrible torture of warfare, that he had to feel horrible for killing Rin. He might have stayed with Madara and done all this just to stop him at the end. It'd be a typical Kishi trolling, anyways. "Obito isn't really evil" the same way Nagato and Itachi weren't.
Kakashi... I want to build a world where heroes don't have to make pitiful excuses in front of graves.
He isn't out for revenge on Kakashi or he'd just kill him. He's sad that his friend had to go through the horrible torture of warfare, that he had to feel horrible for killing Rin. He might have stayed with Madara and done all this just to stop him at the end. It'd be a typical Kishi trolling, anyways. "Obito isn't really evil" the same way Nagato and Itachi weren't.