Hope your plane took off and you are not stranded!
Yes it is odd.
Why go to a 35 year old movie to make a point about humanizing NG?
When in fact it didn't actually humanize her at all. A reference to a fictional character in an old movie is distancing NG's humanity in my opinion. Why not talk about NG's role as a grandmother, mother, widow, church goer, volunteer or other info about her life.
But of course the best way to humanize someone is to talk to them directly. A kidnap victim is just an object, a money making tool. Turn them into a real person by talking to them directly. So the advice to the kidnapper to go talk to NG is good. And assumes NG can make the case herself.
But still begs the question why use an old movie to do this? Why not just tell the kidnapper to talk to NG, get to know her, etc.
Why introduce the idea of a serial killer to a kidnapper holding your mother? This goes against psychological crisis management. If you have an aggressive person threatening to harm others, you don't start talking about other killers who are famous and made a name for themselves by killing people.
Yes perhaps the kidnapper instructed SG to say this as a coded message. Perhaps it verifies that SG read the ransom note they sent. Or indicates that SG is agreeing to certain terms without publicly disclosing the specifics.
Or perhaps there was something about the crime scene and note that made the FBI profilers think it was a good idea to go in this direction. A criminal leaves their personality fingerprint on the crime scene. The crime is not a personality aberration but a reflection of their daily personality. It is a picture of who they are.
So perhaps there was something in the RN and crime scene that caught the profiler's eye.
IDK. Again just speculating of course.