I don't know what it is, but I hate fat people that hate themselves.
Why the animosity towards self-hating obese people?
They are just pitiful to me.
It sounds like you just don't like the way some people look. It's wrong to hate others based upon their appearance.
No. They are just annoying.
These people can't help the way they are. Hating anyone over things they can't control reflects far more on you than them. If you want to do your part to make the world a little better, try compassion.