Deidara gets sick pleasure out of killing people and blowing stuff up. Him and Hidan are both sick freaks who enjoy killing just for the heck of it.
As for Pein, no way in heck is he the second most evil.
Deidara and Hidan are sick freaks who enjoy to kill just for the pleasure of it all.
Pein doesn't enjoy killing like a sick freak. He's doing his deeds to create a better world, which I salute him for.
Pein is a character I really feel I can get behind and cheer on because of that, though I do support Naruto over him.
Pein is basically like Gaara. Commits evil deeds, but isn't really evil. He's only misguided.
This is the way I define evil: " Getting sick pleasure out of committing evil deeds and being unable to live in a peaceful world. "
Neither of these apply to either Pein.
1. He doesn't get pleasure out of killing so much as he merely doesn't care.
2. A peaceful world is exactly what he's trying to create, so he could totally live in it.
Don't get me wrong. We all have our opinions, but I just get a bit frustrated when people refer to 'misguided souls' as being pure evil without looking at the big picture.