Hi, i'm 15 and us such, ever so slightly insulted by the title you chose for this thread, moving on...
Age really isn't important here, if you'd been in the same situation with a 30 year old man you'd still have thought he was a dick, you just wouldn't be able to stereotype him since he's not surrounded by those with the same tastes and ideas. I also fail to see how someone is "uneducated" simply on the basis that they either disagree or don't understand your opinion, as it happens i enjoy LoZ but i don't really regard it as a big kind of thing, i sort of see it as a game, an influential game, but just a game nonetheless. My gripe here is that apart from anything, you're grouping anyone under a certain age into one big group you can poke the fun out of, which isn't particularly constructive.
Yes, that thirteen year old kid was a dick, but the response was hardly calm and rational and frankly you both seem fairly childish to me. *Rant mode OFF*
Incedentally, and i doubt anyone does it delibrately, a few people have a tendency to sound really patronising when speaking on behalf of the youth, i know it's not intentional but it seems like a bit of an own goal.