Everyone more or less laughed and made fun of special children (and also "weird" or "abnormal" people) at one point in their lives, you'd be lying if you deny that.
My question is,
Why do we laugh?
Is it because it is genuinely funny, thus we laugh?
Is it to make ourselves better? if so what's the difference?
It is genuinely funny because they aren't normal.
Is there something wrong with that?
I honestly don't think that people laugh directly at special children. For example, if I call my best friend a "retard" it is meant purely as a joke. I mean we hear that kind of name calling or joke since childhood. We don't really put much attention into it. Special kids look and act differently, and unfortunately when we make stupid faces when joking with friends the word "retard" always come up to describe the person who's doing the action. If you're a fan of Jim Carrey's way of acting, you know what I'm talking about.