I think this may be another example of post hoc ergo propter hoc ("after this therefore because of this"). The assumption here seems to be that the monks are able to do what they do because they believe in the right things.

My feelings are with RAZD's as I understand them to be. There seems to be a common experience of human spirituality which gets filtered into different religions. You might be able to accomplish some amazing things because of your deep faith, and other adherents of other faiths can do the same. At the core of this seems to be something about the nature of spirituality and faith, and the different rituals people go through in order to put themselves in the right mindset to accomplish extraordinary things. Does that mean we have to believe in reincarnation? No more than we have to believe in Noah and a global flood. These are bits of dogma which accompany different religious beliefs; in my opinion they don't have much relevance in regards to the "big picture" or the core of human spirituality.