As offensive as that woman's words are....they're not a hate crime.
Ironbite-You just can't label anything you want a hate crime.
Reminds me of the line from King of the Hill: Dale just had someone vandalize his property (accidentally, but he didn't know that) at night, so he goes to the police and says,
Dale: This is a hate crime.
Police: how do you know?
Dale: It is a crime, and this person clearly hates me.
Also, worth noting from the first line of a certain wikipedia page,
Expressions of hatred toward someone on account of that person's colour, race, nationality (including citizenship), ethnic or national origin, religion, or sexual orientation is forbidden.
So, it doesn't appear that weight would even be covered by such a statute. Heck, disability isn't even covered as a protected class under this statute (and I mention this as in the United States, weight is also not a protected class, though severe obesity may be considered a disability and get ADAAA protections).
This is why I always tell people to just go to a lawyer.