Something that really bothers me...

There is somethng that always bothered me. Why does people look at a person on how they look? Why do they depend on people like that? Why?
I always watch someone getting insulted by how they look. Sometimes I want to tell them to look at the person's indside. Their heart is important than the outside. I sometimes wished to tell this infront of their face, I sometimes wished they atoned. I sometimes wished they wouldn't depend on people like that.
"The world is like that"Mama would say. But still I hate it. More than me getting insulted. Why does my inoccent friends have to be looked in a way like that? why?
This is what really bothered me and still does.