Why would a 'Soul' have to be Christian?...or of any specified 'religion' on this world ?
Hmm...
First off, I am an agnostic, not a theist or christian. I was describing a common position among conservative (`fundy') christians I don't agree with.
Second, it is not a matter of a `soul' being `christian' from this POV, rather, it is a question of Gods *authority*. Their take is that the biblical God
is the creator/ruler of the universe, and the judge of *everybody* within it - regardless of what *anybody* else thinks about it.