And they shall say, Because they forsook Jehovah the God of their fathers, who brought them forth out of the land of Egypt, and have attached themselves to other gods, and have worshipped them and served them; therefore he has brought upon them all this evil.
2 Chronicles 7:20 then will I pluck them up by the roots out of my land which I have given them; and this house, which I have hallowed to my name, will I cast out of my sight, and will make it a proverb and a byword among all peoples.
2 Chronicles 7:21 And this house, which is high, shall be an astonishment to every one that passes by it; so that he shall say, Why has Jehovah done thus to this land and to this house?
2 Chronicles 7:22 And they shall say, Because they forsook Jehovah the God of their fathers, who brought them forth out of the land of Egypt, and have attached themselves to other gods, and have worshipped them and served them; therefore he has brought upon them all this evil.
The verse centers on "shall", "forsook", "jehovah", "fathers", "brought", "forth", "land", and "egypt". It is saying that the verse draws attention to "shall" and "forsook", so its meaning should be read from those terms before moving to application.
The prior verse says "And this house which is high shall...", giving immediate footing for "shall" and "forsook". In 2 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "shall" and "forsook" with trust shaped by these words, not by a vague optimism outside the passage.