Trying to mind my own business

I'm in Target doing that shopping thing and I hear this kid, screaming, so I wonder over to the noise and this young girl is screaming ,I don't want it, I don't wont it. There at the pharmacy section. I see what must have been a family relative of hers, she was just getting up from the chair where they give shots. As the kid is still screaming, I don't want it, this women says, it's no big thing, it feels like a scratch.
I said, "if the kid doesn't want it, don't give it to her"
I was yelled at by the mother, understandable, but the shot giver was hell bent on shutting me up

I feel disgusted about people right now