I think that the real story behind Naruto to me is all about having hope and believing in yourself and in those around you and in never giving up until it happens.
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and
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summarize two of the main points in Naruto I think most effectively. If we view people as simply good and evil and not as individuals with reasons for their actions, then as Pain says (
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), we are doomed to a self-defeating cycle. If you want pointlessly evil characters, you simply have to search for another manga, it's just not what Naruto is about I think.
In Diedara, Kakazu, and Hidan's defense, with those abilities of theirs, is there really anything for them to do but to kill? I mean when you are that destructive, have an immortal body that really is only good for killing others, and can steal people's hearts, what else are you going to do, bake bread?
On a side note about the Juubi, it's the strongest thing in creation. The Juubi was sealed so that it could not harm the world with it's mythical power, purposefully or not. I don't think it makes it evil, just a fount of unbelievable power that the Uchiha villains are abusing. This is personally why I like Naruto and what I have found in my readings.