Rookie

raine, did you notice how you just used a gimmick maybe also used when you were yourself ten to dismiss your own opinions (on any subject)?
Of course you aren’t dismissing her political opinions, just saying she is rude and “[probably] doesn’t know any better” because she is 10, like you could say she is irrational because she is female. It comes from you wanting to reminds she may not be rude on purpose, after all the line between being sarcastic and being mean is thin, but it’s condescending and perpetuating stereotypes about youth.
You could say: “yeah, but maybe she will act differentely after some time…”, but it’s true of adults too and people never say that of rude adults who probably doesn’t know better, because being adult isn’t considered to be most of their identity.
It’s like that old saying about how if people aren’t sexist, then they aren’t sexist to people who have something considered a bad quality, not only to people who are considered alright.
Maybe in such situations people don’t keep the person from voicing their opinions because they expect they’ll be rude or misinformed or too emotional because they’re ten, or women, or some thing else these are just examples, but rationalizing that a person is rude (or anything) because she is ten is the same kind of thinking, and facilitate the first situations where the person is kept from voicing hir opinion.
It just happens she is ten, and it just happens she is rude. It may also be that it just happens that she doesn’t know better, just like adult Christine Albanel. (I’d say Sarah Palin but I don’t really know anything about Sarah Palin even if I read a lot of time that she doesn’t know better, but you get the idea)