I believe its true for all religions and not just Christians.
This site helped me see that I was not alone in my pain, confusion and frustration.
I do not think his family would ever accept me (my now ex-boyfriend told me as much).
And I don't think I would have patience to try, try, beg and beg some more to be loved by him and his family.
When we become unequally yoked, as in Muslim/Christian marriage.leads to some unintended consequences that may not be apparent in the beginning.
Cultural issue become more of a focal point than they need to be as you search for common ground and beliefs.
Even if your not "religious" this issue will come up, especially after you have children. On the surface, we would appear not to have much in common, but the building block we have is Faith, and that is a solid base.