Although it is natural many people do find it offensive. I suppose I was thinking about the bigger picture.
"It's a public place because anyone can come into the shop. We get customers of all ages. I thought it was appropriate because I have offered it to other people and they were happy with it"
So he was thinking more about someone being offended by the woman breastfeeding than the woman breastfeeding.
There is nothing offensive about breastfeeding.