Have you watched the Scorsese film Silence, based on the novel by Shusaku Endo? It's all about Crypto-Christians.
The hidden Christians in Japan definitely suffered alot. In the end of the film, you can sense the depression resignation of the priests as they help to dismantle the outward signs of their religion. But it is implied that the younger priest Rodrigues faith is actually strongest in this part of the film, when it is most hidden and he feels the most defeated, and Rodrigues comes to a profound realization about God.
It's a very deep film, well worth watching. Pastor tried recommending it to people at our church after he read the book (I gave it to him), but some found it too disturbing, and it is. But that's why I think its worth watching.