[quote=@Gowi]
<Snipped quote by Tarquin>

In addition to playing into the spirit of the genre I would say that we also have to account that these kids [i]know[/i] they will be killing people and to a point are before they make genin are taught not only the basic to the setting’s abilities but also the knowledge of the history of their village— they [i]know[/i]. Though maybe that’s just me reading into it.
[/quote]

I really don't see how knowing what they're getting into will make it all the more easier. They're still killing real people. Real soldiers don't go into war calm in the knowledge they "know" they'll have to kill someone. 

And again, this isn't where they reluctantly acknowledge the reality of the situation, it's where they go in, kill someone, and don't even think about it at all. Like, you kill a person for the first time ever, and its just a tiny part of your first wacky mission.