“At the time that I punish them, they will be cast down.” Jeremiah 6.15. Well, of course. If God punishes them, of course they will be destroyed. Isn’t this redundant? No. Look up to 6.14. “They have healed the broken-ness of my people superficially.” The prophets and priests of the time proclaimed peace when there was none, but at least it made the people feel better.
I think this is the point of this verse. When God judges the people, there will be no easy fixes. I have heard that God is judging our nation. Look at the forest fires and blizzards, the floods and the droughts. The disasters we have suffered in the financial realm were laid at His feet also.
These may be precursors, warnings as it were, but these events are not judgment. When the True Judgment of God falls, whether it be on a nation or an individual, that nation or individual will be cast down, and there will be no quick fixes.
It is better that we fall on the stone and are broken now, than to have the stone fall on us later and be crushed.