Yelled at by someone in a restaurant for letting my baby feed herself.

Hi! My daughter is 9 months and LOVES food! She has a great appetite and really likes to try new foods. For a baby she has a very sophisticated palate I think. We did a variation of BLW so she likes to feed herself when she can. At home she feeds herself everything but when we’re out I feed her the messy stuff but food she can easily pick up I let her do it herself. Yesterday we were having lunch with some family out at a local Mexican restaurant. My daughter fed herself rice (not a lot) and a cheese quesadilla. She doesn’t throw the food just drops it when feeding. She was using her signs for more of the guacamole and beans that I was feeding her and making some baby noise. I will admit I’m kinda blind to the baby noise because I hear it all the time but she’s not an overly loud child. Anyways we were all done with our meal and I’m very self conscious about leaving a mess for the wait staff already so I keep a tiny dust broom in my diaper bag to clean up after her. The baby is being held by a family member and I’m cleaning up some when a group of women stop from 4 tables over to talk to me. They tell me that it is disrespectful to let my baby waste food and disturb other customers and how much she ruined their lunch. How children are not supposed to actually eat in restaurants until they are 2 and that I was stupid to think any business wanted to deal with me or my child. I was crying and just apologized and most of the other customers around us took up for us and told me that my daughter did nothing wrong and the women were very wrong. The women that complained had the same waitress as we did and the manager/owner of the restaurant was standing behind the women while they were yelling. Neither the waitress or the owner said anything at all about the altercation. I was not expecting them to apologize or anything like that but I can’t help but feel like they encouraged the women to say something. We dine in / get take out from this restaurant at least 4-5 times a month and have never had an issue. Am I being disrespectful to others by letting my baby eat?