So Pissed Off

I can't believe the nerve of some people. I was out with my son. He has really bad seizures so he has a service dog. I was taking my son out because it's his 17th birthday so we just went to the mall to let him get some stuff. His service dog has a vest so it's obvious he's a service dog. While we were inside foot locker, I here a women say "go pet the doggy". Me and my son turn around and this girl who looked about six went to up and was trying to pet the dog. My son pulled him back which made a girl sad so she ran to her mom saying we won't let her pet the dog. This lady says to me "If you're gonna bring a dog in here expect people to pet it." I say you aren't supposed to pet service dogs. She goes "Come on sweetie she's being a bitch!" Does no one understand you don't pet service dogs. Or even if it isn't a service dog you don't tell your kid to go pet a dog without the owners permission.