Why are people so mean the internet?

So i asked a question asking if you guys think my mom will get me the galaxy S4 for christmas because she sort of gave me hints. I did not get my hopes up but i wanted to see what people on here thought. I got two answers. Both said i did not need it. And i'll admit i don't need it. I have a iPhone 4s (which is laggy but it works nonetheless).It is obvious i want the phone more than i need it. I mean it is christmas, you usually get things you want a deserve. The other answer said i don't need and don't deserve it and that i'm a spoiled brat and they seemed to be attacking me in a way like i'm an ungrateful daughter. I don't know why that answer was so mean i did not say anything to come out as a spoiled brat. I'm 16 years old, and a good girl. I always listen to my mom and anything she has given me is something i earned. I work hard and study to get good grades.
Why are people so mean if they don't even know you or anything of what is going on?
I know i shouldn't feel too bad but i guess i'm just really sensitive.

Ahh don't worry about them people get bold online it's crazy. And well maybe your mom got it maybe not.I'm sure if she didn't it was due to a financial obstacle and not just to be mean.

People can be mean here because they are not face to face with you. They might be jealous that you already have a iPhone 4s so be nasty because they don't. Best thing is just don't let them bring you down and good luck getting what you want for christmas.
You don't seem to be a spoiled brat at all.