Re: why the difficulty accepting?
Its basically the plotholes.
You know, controlling Yagura, the mizukage, for years at age 14, fighting Minato at age 14, all the while by having a body like an adult...
And while Yagura was being controlled before Obito even graduated from the ninja acedemy...
The list goes on.
Also, note the many flaws in the manga now, Minato's head on the hokage mountain even while Minato has never been Hokage during Obito's lifetime as a leaf ninja.
I'd say Kishi is ****ing us with a joke.