You're assuming they believe as you do, in which case, they probably would have made a more hearfelt renunciation of their "conversion" after they were free. We actually discussed this issue in our church yesterday, among people who have been in all kinds of stressful situations as missionaries. The consensus was that they had families to think about, and what they have in their hearts is between them and God.
My point exactly. God knows our hearts and is with us in the deepest darkest times like these ment were in.