The Lord explained clearly why Israel suffered, especially by being carried away captive,
“…when the house of Israel dwelt in their own land, they defiled it by their own ways and deeds; to Me their way was like the uncleanness of a woman in her customary impurity. Therefore I poured out My fury on them for the blood they had shed on the land, and for their idols with which they had defiled it. So I scattered them among the nations, and they were dispersed throughout the countries…” (Ezekiel 36:16–20).
No wonder the Western Nations are suffering. They have turned their backs on the Lord, so He has turned His back on them.
Does that explain why at least some churches lose numbers of people?