Stealing from anyone makes one lower than cesspool slime.
Not to defend the crook but did he know she was a nun?
Unless she was in a habit or had a sign on her back identifying her as a nun, he had no idea. To him she was just a defenseless little old lady and an easy mark.
My first home visit to the Mission Hill project there resulted in an armed robbery and the social worker who was training me almost got raped. Needless to say if I had a bleeding heart (and I didn't) that wound was closed up fast.