Would you call the guy that killed your parents "cool"?
Would you call the person who shared your same life hardships, had similar dreams, went down the wrong path (that you might also have ended up in) but became sincere, redemmed himself, saved your life and your teacher's, and accepted his punishment ''cool''?
Naruto is talking about the current Obito, and his right decisions and his dream of being a Hokage. I'm baffled on how this goes over the heads of some people?
Is the author giving too much credit to his readers, thinking they would understand such an impactful, but subtle scenes? there were some layers in that, and it wasn't a simple scene, it was quite powerful. Again, all I'm asking of those who are ranting about this, to think for a couple of minutes and re-read the chapter (and probably the old chapter where Naruto talked to Juubito) and try to understand and wonder why Naruto said that, and what he meant, and what he was referring to, while paying attention to the context of the situation and Naruto's emotional nature, and personality.
If you did that but still reached the same conclusion and your opinion didn't change, then the more power to you.