Just because I’m wearing a white shirt, kippah, slacks and have four days’ growth on my face and chin* does not mean that your child is safe with me. How could you possibly think of leaving your child with a stranger, even if only for a minute? Just because I’m Jewish as you are doesn’t mean that I couldn’t be a psychotic murderer or kidnapper. (For the record, I’m not!) Consider yourself lucky that it was me and that your kid was there when you got back.
I know a guy who lets his wife watch his kids. Lunatic! Just because she wears long skirts and a tichel doesn’t mean you can trust her.