The point is not that two people of different religious faiths can't live happily ever after; of course they can and there are plenty of examples to prove it. However, if you, your S.O., or both have a very strong belief in a particular religious faith -- be it Christianity, Judaism, Buddhism, Satanism, atheism, whatever -- it is essential that you have a serious conversation about what those differences mean in the long term. How will you raise your kids? What faith will preside over your wedding? How big a deal is it if one of you believes Jesus was our Savior and the other doesn't? Does the Heavenly Postal Service deliver postcards to Hell? Are you cool with paying extra postage? Etc.
Question #3: Do you believe strongly in Heaven/Hell/Xenu?Poor Nicole Kidman. Married -- happily, it seemed -- to Tom Cruise for exactly 10 years. And then POOF! They were done. Why? If you believe the rumors -- and having worked as a research assistant on a book about Scientology, I do -- it turned out that Tom's commitment to the gospel of L. Ron Hubbard was stronger than his commitment to Nicole. Nicole, you see, was a faithful Catholic, while Tom's belief in Scientology grew over the years; instead of being able to live in harmony, Tom and Nicole's differing beliefs on the afterlife -- not to mention the manner in which to worship in the present -- came to a head. Nicole was left out in the cold, while Tom picked a more willing convert in his next wife, Katie Holmes.