I'm not saying that you should hide yourself for being christian. I wouldn't have any problem working with somebody having religious themed personal items on their desk. That's your private space as far as I'm concerned.

I've worked with a catholic guy who told me he prostested the same-sex marriage law in france. I completely disagree with his position but we just stopped the discussion at this point and we kept working together just fine. I would do the same if we worked together, probably.

Now if you kept bringing it up or even wear anti-abortion shirts or stuff like that then yeah, I might ask you to tone it down. But other than that it's really not my problem. The key element is respect I think. I respect you, you respect me and everybody's a happy bunny.