Some of our brothers went to the lands of disbelief and returned without a creed; what is the successful method for calling these people to the truth?

Question:
He says: Honorable Shaykh, may Allah grant you success. Some of our brothers went to the lands of disbelief and then returned without a creed, neither in oneness of lordship nor in oneness of worship. It is difficult for us to return them to the sound fitrah (innate natural disposition) they had. I hope you will guide us to a successful method that will have an effect on people like these.

Answer:
This is the reason why traveling to the lands of the mushrikin (those who associate partners with Allah) is forbidden, and why he intended to migrate to the lands of the Muslims. And this is the danger of sending people abroad; they call it sending abroad now. This is the danger of sending people abroad. So there is no remedy for it if his heart becomes corrupt, if his heart becomes corrupt and he becomes an atheist, there is no remedy for it, because his heart has become corrupt and it cannot be cured. We ask Allah for safety. But you must disavow him and stay away from him. Yes.