OK, this is probably not answerable, but I'm curious.
The movie End of Days (terrible movie, I realize, but it's a guilty pleasure movie of mine), there was a line said in the church, after Christine York (Robin Tunney) has taken refuge there with Father Kovak and others, when a cardinal and some of of his "lackeys" walk in with the intention of killing her. (I know he's a cardinal cause he's called "your Eminence").
The priest, Father Kovak (played by Rod Steiger) says "But you can't prevent evil by doing evil.", which, of-course, the Cardinal and the people with him pay no attention to and say "there's no time, she had to die, yada yada (I'm paraphrasing).
Is it ever implied or suggested that bad things will happen on Earth if she's killed? Or will bad things only happen if she is seduced and has a child with Gabriel Burn, aka, Satan?
Perhaps the movie wasn't thought out that carefully, but I'm curious if anyone knows more about this than I do.