Mishneh Torah, Foreign Worship and Customs of the Nations 4

Sugya Map: The Limits of Ir HaNidachat

• Core Issue: The threshold of liability for the medichim (instigators) vs. the nidachim (the misled city inhabitants).
• Nafka Mina: Does the medich incur death (stoning) solely via speech, or is the city’s actual commission of avodah zarah a prerequisite for the medich's liability?
• Primary Sources: Deuteronomy 13:13–19; Sanhedrin 61a; Rambam, Hilkhot Avodat Kokhavim 4:1.

Text Snapshot

"מדיחי [העיר]... הרי אלו נסקלין אע"פ שלא עבדו עו"ג, אלא [ש]הדיחו את יושבי עירם עד שעבדו אותה." (MT 4:1)

Rambam’s precision is lethal: the medich is liable for s'kilah (stoning) even if they did not personally worship, provided the city successfully worshiped. Note the dikduk: the instigation must bear fruit.

Readings

• Ohr Sameach: Argues that the medich is not merely an accessory to the city’s sin but a distinct category. He notes that if the instigation fails (the city does not worship), the medich—even if they spoke—is exempt from the Ir HaNidachat death penalty, as the law requires the city to be "led astray" (niduchei).
• Kesef Mishneh: Initially suggests the medich is stoned because they are an oved avodah zarah in essence. The Ohr Sameach effectively pushes back, clarifying that the medich is judged by the act of causing the city to cross the line, not by their own ritual compliance.

Friction

• Kushya: If the medich is stoned even without personally worshiping, why isn't every mesit (individual instigator) who speaks to a non-consenting victim stoned?
• Terutz: The Ir HaNidachat mechanism requires a communal threshold. As per Sanhedrin 61a (Rav Yosef), the medich is only liable when the community is successfully corrupted. The medich is the catalyst for the collective collapse, making their crime a communal-political transgression, not just a private religious lapse.

Intertext & Psak

• Parallel: Compare with Hilkhot Edut 18:1; the zomemim (conspiring witnesses) of an Ir HaNidachat are treated differently because the entire status of the city is a legislative construction (gezerat hakhatuv).
• Psak: Halachically, the Ir HaNidachat serves as the ultimate meta-psak heuristic for communal responsibility. It defines a "point of no return" where a community loses its legal personhood.

Takeaway

The medich is not judged for the intent to corrupt, but for the success of the corruption. Communal apostasy transforms individual speech into a capital crime.