Its simple talk no jutsu the most haxed power in naruto it was so op it killed nagato dont see why it wont work on madaraxd
naruto didnt just talk and nagato died, he talked and made nagato see how he strayed from yahikos goals, and relapse into being good again. Now as good again, he felt bad about what he had done, so he revived the village as an act to attempt to redeem himself.
Madara on the other hand only cares about dream world and world domination, and is upset over his brother. He is not going to become good regardless of how much naruto talks. Obito is a 50/50 chance.
but seriously, enough of the "talk no jutsu" cant someone just be inspirational, and talk in a way that affects people, and gets them to ponder what they have done? Was narutos "talk no jutsu to gaara really tnj, or was it just gaara saw how happy naruto was, and how he fought so hard for something. SO gaara then pondered if what naruto fought for was worth it etc, and became good.
Its not talk no jutsu, it is human nature to change sometimes, and to have the ability to have a conscience.
only reason i care is because it gets annoying listening to you people whine about tnj this tnj that. JUst accept it is part of the story. If you dont like it make your own story and leave kishis alone.