The Uchiha clan is one of the most important ... to think that it should be destroyed and replaced with Infinite Tsukuyomi. Madara's efforts worked, and Obito became one of his biggest supporters.

Both Kara and Akatsuki aimed to achieve the Infinite Tsukuyomi, a grand and cataclysmic objective. Deception within ranks: Members of both organizations were kept in the dark about their true goals ...