I would say the whole Obito thing really crossed the line for me.
The problem isn't forgiveness. Forgiveness is definitely a key element to the Naruto manga and its theme, so it's not unusual. It's how Kishimoto executes this that's the problem. Praising him or calling him "awesome" or whatever was unnecessary and went too far. I feel one should try to forgive but never forget the transgressions that were done to oneself.
I don't find the remedy to be the death penalty/capital punishment like some have alluded to in this thread. Paraphrasing what another person said before, the death of the criminal would not erase the pain and suffering they have caused and is not equivalent to the death/suffering your loved one went through. It's counterproductive to punish the act of murder by killing. It seems to be like that society is indirectly condoning killing as a form of justice.
People are not born evil or good. The social environment you grew up attributes to the future actions you take and that should be taken in account when looking into the reason why a criminal would do what he/she did. There should be some sort of rehabilitation to treat these people instead of choosing the easier alternative (i.e. death). Should this mean you should sympathize with them? Heck no! And this definitely does not mean you should extol their actions.
I mean, Sasuke would be a great example of this. He has crimes he's guilty of and we the reader know he has a horrible past that was a big factor in affecting the actions he took. Should he be praised? No. Should he be forgiven? Eventually. If going with the mentality some people are going by here, they would demand a death sentence. That's perpetuating the cycle of hatred. There are other ways to atone for one's crimes and this is the path Kishi wants to take. The hope that there is redemption. Again, goes back to forgiving but never forgetting.
The problem I mentioned before about the execution is Naruto. Though I support forgiveness, there's nothing wrong in a person refusing to forgive...for the time being. It's human nature to feel slighted when something unjust has been done to you. Time heals all wounds, you know? Yet, I feel Naruto was too quick in this whole Obito thing. And calling him awesome? WTF. Just because they share a similar dream and he was talking about the "young Obito?" Just because someone's redeem themselves for a short period of time does not wash out all the bad they have done. Just because you were once good does not mean I would like that part of you, because it's similar to me. Forgiveness, alright. Calling them cool? Weird.
I think Kishi should have taken notes from Rurouni Kenshin. I think this anime did a much better job on the whole redemption and forgiveness thing. The main character does the whole talking thing Naruto does. However, it's moderated down to where it's not overwhelming and his kindness is realistic. Naruto just doesn't convince me whatsoever.