[Nyororin]

I think all of this depends on how strongly each party feels about their religion. If neither tries to push it on the other, or make it a part of the relationship itself... Then there shouldn`t be an issue.

That is - until they have children. I cannot tell you how many times I have seen inter-religious marriages literally fall apart once a child comes along and both parents want it to be their religion, and not the other. Even a lot of couples who both say they don`t care about religion fall apart at this point as their deeper beliefs come to the forefront.