The conversation quickly moved off of weight and healthy eating and the "awareness of obesity" Kang says she was trying to raise. Instead, many women -- moms in particular -- used the photo as evidence of Kang's shoddy dedication as a mother, as if tight abs leads to neglected children.
I don't think this was a premeditated attempt to ridicule women that don't wear a size 2, nor was it an attack on men that lack the presence of washboard abs. This is merely an instance where her motive was misrepresented. Maria Kang is not the "real" problem -- self-acceptance is.