Meh. It's all just preaching to the converted IMHO. Aside from Homer Simpson, I doubt too many people who are that impressionable are going to want to buy the game or the books if they're not already down with the themes they bash you over the head with. Besides, as a fan of games like Manhunt and the GTA series which come from a lot less morally defensible standpoints, I really don't have that much of a problem with the Left Behind crowd having their say. If it's not a good game in and of itself, it'll drop like a brick into the bargain bins anyway.
Be considerate to others or I will bite your torso and give you a disease!