Why do people want to be haters?

I did some research and found some really interesting answers from good people:

Haters will always have something negative to say. A hater is a person who constantly talks down about you to your face or behind your back, someone who always have something negative to say when you are doing good or on the come up, or being something like jealous. Once a hater is always a hater. More than likely a hater is going to die a hater. LOL! All I can say is get used to Trick. Like T.I. said, "You can hate me if you want to ,but you just wasting your time. That is kind of my motto. Haters get mad when you call them haters and point them out. Haters can motivate you if you let them. It is mostly best to just laugh at a hater. Most of the time a hater is just envious and your biggest fan. Haters always have trouble accepting someone's success, haters hate what they can't imitate;etc. Haters fall back! People choose to be haters for various reasons, but it all boils down to a lack of self love. If you really love yourself you wouldn't have any room for negative behavior and you would be able to love others as you love yourself since you know what it feels like.

Also watch this she is awesome, I love what she says about haters:

http://www.youtube.com/watch?v=AKFmR41KuPI