Just read a blog post in which the author said women who are overweight were "not motivated" to lose weight and would rather watch TV than exercise.
Since I can't punch the author in the throat, let me instead praise women with a bit of heft.
I know many larger women who raise children, who work jobs, who sing in their church and teach Sunday school, who enjoy life and laugh a lot, who volunteer at shelters and soup kitchens and food pantries, who write poems and books and songs, and who can cook a casserole that will break any diet. They worry about their appearance and they walk and they diet and they do their best, but here's the thing: None of us are going to get out of this life alive.
So if they choose to have that cupcake, they don't need their fellow women attacking them. They already have a society that's trying to say they have to be perfect, and it's almost more than they can bear.
If you can't support them, then get off their back.