There is an interesting discussion regarding religiously divided households here: http://www.religioustolerance.org/ifm_diff.htm
With the most suitable application being this one:
If the spouses have a high level of commitment to their faith, any form of compromise may be intolerable. Each spouse may choose to follow their past religious heritage, separately. They would continue to go to their own religious services and celebrate different holy days. This is considered the least desirable approach by many couples, because it reduces the amount of time that they spend together and diminishes the level of companionship in their marriage. This may be compensated for by a substitute joint activity.
A crisis may develop if the couple has children. One spouse may be willing to give their partner complete religious freedom of belief and practice. But they may not be able to tolerate what they see as teaching "lies" to the children. One "religious skeptic" posted to a thirties-something Internet list: "I...am having trouble raising our children in 'her' church when I don't support it or many of its doctrines."
Dr. Willard F. Harley of Marriage Builders 2 recommends that whenever a conflict arises, to:
| set ground rules to make negotiations pleasant and safe|
| have a time out if you reach an impasse|
| remain respectful and nonjudgmental at all times|
| identify the problem, so that each spouse can state the other's position accurately|
| brainstorm solutions, without evaluating their worth or practicality|
| choose the most appealing solution|
Dr. Hurley writes: "...marriage (and children) will thrive only if spouses put each other's feelings before the dictates of their religious convictions. It doesn't mean that religious convictions must be abandoned. It simply means that you must live your faith in a way that accommodates the feelings of your spouse."
The "diversity" option may be the only viable one in situations where both spouses are strongly attached to their separate faith groups.