So their spiritual beliefs are essentially littering. 
Clearly, Harry Kim is a demon & should be burned at the stake.
corporeal resurrection. huh.
The recently dead are attacking the warp core!!! :eek:
This episode is secretly kind of horrifying.
ZOMBIES!!! :eek:
without a taste for brains
So far… :eek:
secure location for your own protection is always a bad phrase
It’s Samuel Clemens! 
no one notices how much bulkier he seems to be now?
I’m curious as to how they developed the technology to send these bodies, how they did it, etc. do the doctors actually know what they’re doing?
So spirituality is neatly & scientifically explained. Hooray! See, every religion ever? Was that so hard? 
They mention that the rifts are naturally occurring. Presumably some ritual grew up around some happenstance body disappearing? It would be interesting to explore that culture more.