I've heard it said that a couple needs to be religiously, financially, socially, and sexually compatible for a marriage to truly work. I know interfaith couples who make it work, but it all depends on the individual. Some are less accepting than others. I was raised in an interfaith family for the first twelve years of my life. I was taken to Baptist and Episcopal churches. When the last child (me) was finally confirmed in the Episcopal church, my father joined the church as well. Up until then, we had the right to choose which we wanted. He never stood in our way, although he still attended the Baptist church at times, as I did when I grew older. I'm comfortable in either.

Some faiths are very rigid about interfaith marriage. My own niece had to convert to Judaism to marry her fiance, because his family would have literally disowned him, and been supported by Jewish law for doing so if she had not. Then again, some Jewish families don't adhere so strictly to that, and think that faith is not as important as that their family members marry someone they love and can be happy with.

When I was young, if you married someone outside the Episcopal church, you had to get dispensation from the church to be married by an Episcopal priest. I haven't been an Episcopalian for years, but I do believe you still have to have dispensation from the Bishop to marry someone who has been divorced. The Catholic church is even more strict about this.

On the other side of the spectrum, I've seen marriages break up when one member joined the Evangelical faith, or some non-traditional faith, like Latter-Day Saints or Scientology. It's more likely, in my opinion, for faith to cause problems when one partner embraces a faith that shuns the other partner, or that encourages the member partner to leave their spouse if they won't convert.