Even when this happens, there are deeper reasons that cause the rift. The biggest reason that wives find the CDing repugnant and morally wrong is because they don't get it. They think of the CDing in terms of Drag Queens at Gay Pride parades, they believe that their husbands must be dressing because they want to attract men, they believe they are not enough for their husbands in other words they think it is all a sexual fetish, plus they remember the defamatory remarks they've heard all their lives made by an unknowing media and ignorant people who in turn have gained their opinions from other people who knew just as little about variance in gender expression.
So the onus is on the CDer to educate his wife and to keep it in check until she learns more and to maintain a balance, reestablish trust, and remove the sense of threat, even if she never becomes fully supportive but instead she acknowledges that he does need to dress and she chooses to not be involved. This requires great communication skills, patience, and a marriage where there is mutual respect among two people who see themselves as equal partners in the relationship.
And how many CDers have the desire to talk at length about the CDing to their wives? How many are able to take the bull by the horns and be open and honest with their wives about their needs? How many will try to hide the fact they want breast forms or wigs, or to go out dressed? And so it's more likely that both sweep it under the carpet while the husband continues to keep some things private, while the wife continues to build up her own version of the story until the marriage's breaking point.
Admittedly, there must be some devout religious women who do think that the CDing is an aberration, but I seriously doubt this is the norm. If the marriage breaks up it is way more likely there was a failure to communicate.
Yes, this is a huge contributing factor as well. And if a wife feels that she was deceived, it will take a long time for her to rebuild trust that her husband is now telling her the truth and not hiding anything. Ever. And he must be patient of the time that it will take for her to grow in her understanding. And judging by the stories of people who do experience break ups, I don't think those CDers ever fully get there.
Let's not forget though ... we're only talking about a percentage of marriages that do break up over this. There are tons of marriages that don't, whether the wife is fully supportive or they agree that she will not be involved.