That is an absolutely disgusting thing to say. It's far beyond her "panto villain" shtick - it's practically hate speech. She would never talk about people with a physical disability like this.
I have to say though, you seem more outraged at her calling an X-factor contestant fat...
Actually, they can't. That's a very ignorant media-style explanation for a very complex set of mental health disorders.
I'm equally disgusted with both her comments & yes I completely agree, one comment on its own isn't going to cause an eating disorder but I would argue that a comment such as this would be enough for a vulnerable person with mental health issues to take it out of proportion & this could lead to an eating disorder.
Either way KH really needs to shut her mouth about things she has clearly no clue about.