I'm more interested in why people only know of things that they were taught with or raised with, when "seeing" past life or unexplainable spiritual events.
As in, many Buddhists I know have seen the spirits of recent death coming to tell them something, and Christians I know have seen angels in purple ropes coming to tell them stuff, etc. But you never see the other way around, not a Christian seeing recent death coming back on the 7th or 49th days, or a Buddhist seeing a purple roped angel coming down to tell them stuff, etc.
This just doesn't fit the normal distribution of how things happen based on genetics, location, time, age, gender, or any statistically significant categories.
Except in psychology class they've done experiments on people that can be hypnotized, and concluded that some people can be hypnotized even by an actor, while others just cannot, and they have no explanation about why yet.