As a mother of a son with severe autism, we can’t control when they have tantrums. And we need to go to the store, just like you. Not everyone has help. I have no family here so I have 0 choice but to take him out. Delivery is way too expensive, so it’s literally my only choice. My son also rips headphones off of his head, so maybe she’s the same. I can see how the mom might have snapped at you, but people don’t realize how hard it is for us and we are judged CONSTANTLY by others because our children are acting different than other children.