Shared ground
These verses are the narrator’s closing explanation of what the Abimelech story “means.” They do not just report events; they interpret the outcome as payback for wrongdoing. The text explicitly says God repaid Abimelech’s evil—especially the killing of his seventy brothers—and that God also repaid the evil of the men of Shechem.
The summary frames this payback as consequences landing “on their heads,” a vivid way of saying the results came back onto the perpetrators themselves. It also closes the loop with Jotham: the curse he spoke earlier is said to have “come upon” Shechem.
Where interpretation differs (only where needed)
One difference is how directly God’s involvement is understood. Some readers take “God repaid” to mean God actively arranged specific events as judgment. Others read it as God governing history so that human violence and betrayal naturally boomeranged back, with God still named as the ultimate ruler over outcomes.
A second difference is scope: who counts as “the men of Shechem.” Some take this mainly as the city’s leaders who backed Abimelech; others include the broader population that participated in, benefited from, or tolerated the coup.
Why the disagreement exists
The language (“God repaid,” “on their heads,” “curse came upon”) is strong but also concise. The chapter’s storyline shows human choices and political fallout, while the narrator’s final lines attribute the whole outcome to God’s repayment. That combination leaves room for readers to weigh “direct intervention” versus “providential governance,” and to ask how widely Shechem’s guilt is being assigned.
What this passage clearly contributes
Explicitly, the text claims that God ensures moral accountability in public life: murder and complicity do not remain “unpaid,” even when they succeed for a time. It also presents Jotham’s spoken curse as now realized in events, tying the chapter together and reinforcing the theme that violent grasping for power produces self-destructive results (Judges 9:56–57).