Thanks for the answers, both of you. 
I suspected the difference between religions would be tiny or non-existant to avoid offending anyone within the religion. The differences would have to be inoffensive, and I guess that would be hard to do without taking it too far away from history.
I guess it's the same reason why Adolf Hitler isn't one of the leaders. I'm sure many would be offended, but for me it's more about the history and being able to change it. Also being able to bomb the


out of him would be a nice bonus
.
But I guess this kind of stuff would be best left for modders if they want to implement it, and have the vanilla versions be as inoffensive as possible. Maybe in Civilization 20 will include Hitler - having it in Civ 5 would probably be too early. It needs to be more or less ancient history before people can accept stuff like that. And I don't blame them.
EDIT: seriously, this post made me look like a real jerk, which I can assue you I'm not. The wording may look a bit offensive. I'm not comparing Hitler to religion, just so that's out of the way.
EDIT 2: just thought of another question. Mines improve the output no matter what, but will the mines automatically discover copper or iron and so forth when I get the tech for the resource? Is there a smaller chance of discovery of resources if I make a mine before I get the tech for it, than if I wait until the tech is researched?

I suspected the difference between religions would be tiny or non-existant to avoid offending anyone within the religion. The differences would have to be inoffensive, and I guess that would be hard to do without taking it too far away from history.
I guess it's the same reason why Adolf Hitler isn't one of the leaders. I'm sure many would be offended, but for me it's more about the history and being able to change it. Also being able to bomb the





But I guess this kind of stuff would be best left for modders if they want to implement it, and have the vanilla versions be as inoffensive as possible. Maybe in Civilization 20 will include Hitler - having it in Civ 5 would probably be too early. It needs to be more or less ancient history before people can accept stuff like that. And I don't blame them.
EDIT: seriously, this post made me look like a real jerk, which I can assue you I'm not. The wording may look a bit offensive. I'm not comparing Hitler to religion, just so that's out of the way.

EDIT 2: just thought of another question. Mines improve the output no matter what, but will the mines automatically discover copper or iron and so forth when I get the tech for the resource? Is there a smaller chance of discovery of resources if I make a mine before I get the tech for it, than if I wait until the tech is researched?