People argue that Kisame death were pointless only because Tobi is not Madara which is somewhat true but even though Kisame was fooled, it doesn't take away the fact that Tobi = Madara. Obito who have no real identity believed the concept of the Moon Eye plan to which he had imitated Madara and his ideology hence the real Madara would've done.
So it doesn't matter if Tobi who turns out Obito gets Tnj when the real Madara mostly completed his objective even despite being completely manupilated by BlackZetsu, still He doesn't regret the action, and still believe the whole shinobi system is f*cked up. Thus Madara will always remain the epic villain and Kisame will always believed Madara way of Peace not Obito or someone else!!!
So it doesn't matter if Tobi who turns out Obito gets Tnj when the real Madara mostly completed his objective even despite being completely manupilated by BlackZetsu, still He doesn't regret the action, and still believe the whole shinobi system is f*cked up. Thus Madara will always remain the epic villain and Kisame will always believed Madara way of Peace not Obito or someone else!!!