|Pein isn't that evil. The newest chapter seems to further indicate that. |
Konan is also not that evil.
It's the ones who get off on killing like Hidan, Deidara [even if he was paid, he still enjoyed it], Orochimaru, etc. who are the 'pure evil' ones.
BTW, Konan has protested Pein's methods. Remember this quote? "Why do you insist on such madness?"