DS(9 mo) and I were in the supermarket yesterday and I was amusing him by being silly and singing songs. We passed a woman with an older child, probably 2 or 3yo, who was eating some broccoli leaves, which I thought was amusing. The woman noticed her child eating and shouted at her 'I've already told you not to eat broccoli leaves, what are you, simple or something?'. I was a little shocked and saddened that she called her child simple for doing something that wasn't harmful, just amusing and probably quite nice. I didn't say anything as it's obviously not my business but AIBU to be sad?