I will fan them ... - Or, “I have winnowed them with a winnowing shovel.” The “gates of the land” mean the places by which men enter or leave it. As God winnows them they are driven out of the land through all its outlets in every direction.
I will bereave - Rather, “I have bereaved, I have destroyed my people.” Omit “of children.”
Since they return not ... - Rather, “from their ways they have not returned.”