May Christ have mercy on them.
Do you know if These are Catholics or Prots?
I don't know, but even if they were protestants in a place like Laos, they would be laying the groundwork for a later entry of the true faith. In any event wwe should pray for them to be faithful to the Gospel.
There is a story about a person in a Cuba who listened to evangelical radio programs. They invited him to give his life to Christ. He went to the closest church (Catholic) and told the priest that he wanted to give his life to Christ. some years later he was ordained. Today he is a Catholic priest.
In any event we should pray for them