I am so very sorry that you had this bad experience. Sending hugs
That was a mean ignorant thing for anyone to say and just because someone says something mean doesn't mean it's true. Your Bobby is a precious loved little dude.
I was told as a child and I taught my children:
Just because you have the Right to say something doesn't mean it's Right to say it.
I just don't understand why people go out of their way to find mean negative things to say. Like what's the point? I guess some people are so very unhappy they have to try to make others unhappy. Or..... was this uncaring little girl so insecure that she needed to say something she thought was "cool" so her groupies would think clever.....