[neverending]

Rosemary's Baby is one of those movies, like Paranormal Activity, where you have to be able to empathise with the main character in order to understand why it is scary. If you can't share her feelings of betrayal and uncertainty, her complete isolation, not knowing who, if anyone, she can trust, or if she can even trust her own senses, then you won't find this movie scary.

It's not a judgemental statement- it's just a matter of fact- some people are not able to feel ampathy, to put themselves in someone else's world and feel what they feel. Certain movies require this in order to get the full effect.