Yeah, I don't necessarily subscribe to the "End Times" theology of the books. I stay open-minded, though, and ready for anything. They were a fun read, though, and the plot is interesting, as it is for the game. What's cool, though, is that the game has information pages to read at the end of levels and they present the "End Times" issues in an open-minded way. They don't say "it will happen exactly as this game depicts."
As far as violence in the game goes, it definitely is far less than the typical game these days. The real trick is that violence doesn't benefit you and can actually cause you to lose the game.