(Keeping in mind that this is just to provide some pleasure at the *thought* of saying it.)
"No, I've never committed genocide by feeding my children, do you know someone who has?!?

:"
"There are people who use breastfeeding to cause the suffering and deaths of millions in a deliberate attempt to eradicate their people and culture from the world???

: How DARE you even THINK I would do such a thing!"
Really though, my first reaction to her little "breastfeeding nazis" comment would've been:
"You're f*ing kidding me, right? You don't seriously believe that BS." (Yeah, I do recognize I'd have to quickly explain I meant about breastfeeding advocates being "nazis" not about people having trouble breastfeeding.)