movie, Christian religious symbols are mixed with elements from
science-fiction movies. The alien’s capability to intrude our
bodies or even infiltrate our thoughts is often the most frightening
part. But that ability also becomes a connection to
Christianity’s Holy Ghost, who always follows us and knows what
we’re doing and thinking.
The movie emphasizes the diffuse threat which exists within religions,
and that it’s not that big a difference between believing in a
god or in other aliens.