I believe it is a mistake to believe that one can create the experience of Christ according to one's belief, but not do the same thing when experiencing things according to how a person like Robert Monroe has defined things.
Regarding people having an NDE where Jesus shows them a fire and brimstone like hell realm; first of all, I've read a lot of NDEs and that kind of experience is rare and contradicts the experiences of others. Some fundamentalists claim that NDEs come from satan. I wouldn't be surprised if some fundamentalists have made up NDE experiences in order to contradict NDEs that they believe come from satan.
I believe NDEs are partly a mix of what we believe, partly a mix of what spirit guidance tries to show us, and partly a mix of what the spirit World wants to communicate to people.
Regarding the first and second factor, if a person is really stubborn about fundamentalist ideas, it might be difficult for such a person to have an NDE that doesn't include fire filled hell realms. Therefore, guidance might not have a choice.
Regarding the third factor, my feeling is that the divine powers that be understand that there is a lot of confusion here in the physical when it comes to what spiritual truth is. They want to improve what our overall understanding is, get us to me more open to loving viewpoints, but it is hard to do so when people have minds that are closed in various ways. Therefore, they arrange for various types of NDEs to take place, so different audience members can be reached. The hope is that a time will come where people will no longer believe in things such as a wrathful, vengeful God and eternal damnation.
I believe it is more than a matter of belief. It is also a matter of how open to love a person is. If a person is vengeful and insists on seeing souls get tortured for all of eternity, he or she won't have the freedom to go beyond his or her fire and brimstone belief system. On the other hand, if a good hearted person has a fundamentalist belief system, the love in his or her heart will allow he or she to have an NDE that goes way beyond a vengeful mindset. Many fundamentalists have had such experiences. DaBears posted an NDE not too long ago where a Baptist lady had an NDE that went beyond the fundamentalist viewpoint. I was able to experience heaven years ago, even though I was very atheistic at the time. Perhaps because I still had enough openess of heart to do so.
Thomas Sawyer's NDE is one of the best I've read. He experienced things to extent where it is hard to believe that he was heavilly influenced by his preconceived concepts.
http://www.near-death.com/experiences/reincarnation03.html