I found it alright because all the Six Paths theory makes sense and is really based off the Buddhist belief of reincarnation.
When Nagato used his "death" technique, he got reduced to this current state. His "life" one would surely kill him.
As for all the confusion about who's getting revived, the subs said "Pain controls life and death." The Buddhist theory of reincarnation also has a period of 49 days after death where your spirit lingers before reincarnating into a different body. This may be used to explain why Nagato did or didn't resurrect certain people, but the easiest explanation is that he performed it on the village.
My only problem is that they skipped over Nagato's "How long are you going to make us wait" question.