John Gill Commentary Jeremiah 12:11

"They have made it a desolation; it mourneth unto me, being desolate; the whole land is made desolate, because no man layeth it to heart." — Jeremiah 12:11 (ASV)

They have made it desolate Which is repeated to denote the certainty of it; astonishment at it, and that it might be observed:

and being desolate it mourneth unto me; not the inhabitants of it for their sins, the cause of this desolation; but the land itself, because of the calamities upon it; it crying to God, in its way, for a restoration to its former beauty and glory.

The whole land is made desolate; it was not only the case of Jerusalem, and the parts adjacent, but even of the whole land of Judea:

because no man layeth it to heart, took any notice of the judgment threatened, foretold by the prophets; nor repented of their sins, for which they were threatened with such a desolation; nor even were properly affected with the destruction itself; the earth seemed more sensible of it than they were; this expresses the great stupidity of this people.