But this is where you lose me. I'm not sure how to put up a unified front without putting the marriage ahead of parenting. Parenting is only a part of the equation. Like you said, kids will test you, so sometimes you've got to be prepared to show them things won't always go their way, and maybe even teach them that your life doesn't entirely revolve around them - that you value the time you spend with another human being more. If a relationship never has any problems, there won't be any issues, but I don't think anyone is trying to say that relationships don't take work. If a spouse feels unappreciated, ignored, lonely, sad, or dissatisfied in their marriage, the unified front is a facade, and the marriage needs work (perhaps counselling rather than throwing the kids a party as one poster suggested; maybe even just grown up quality time without talking about kids).
I'm not an idealist, so I'm not assuming a majority or even a significant number of married parents have their lives right with God before undertaking the responsibility of parenthood. I don't even want to get into thinking about parents who become Christians after marriage or children x.x But the point is we don't stop growing in our relationship with our spouse. It doesn't get to stop just because we have a child to look after. There will be frustration, tension, and probably anger at times. Putting the marriage first so that you and your spouse have someone to lean on seems very important to me.
So I know I'm misunderstanding you, and I would like a little clarication on the points where you see me misunderstanding. I do see that you think the marriage is important; I think I'm just not understanding how a marriage properly functions when the hard times come up if the children are more important (still keeping with our rules that the children are physically safe with their physical and emotional needs being provided).
I know a couple who put their children before their marriage. They are on the brink of divorce and miserable. They're trying to make it work for their 10 year old daughter, but it's not going well. In the process, the daughter has become a bit of a spoiled brat (mommy and daddy do everything she wants). I can't help but feel that focusing on each other's needs while the child was growing up would have prevented the situation.