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• The eastern tribes building a great altar by the Jordan nearly triggers civil war — a crisis manufactured by the Sitra Achra through miscommunication. The Zohar (III, 126b) teaches that the Klipot's most effective peacetime weapon is sowing suspicion among the righteous. If Israel turns on itself, the Other Side achieves without combat what it could never accomplish in war.
• The western tribes' assumption that the altar is for idolatrous worship reflects a legitimate vigilance. The Zohar (I, 121a) states that any unauthorized altar can become a feeding station for the Klipot. The outrage is proper — the Tzaddik must respond fiercely to the possibility of a new Sitra Achra portal. What is improper is acting on assumption without investigation.
• Phinehas the priest leading the delegation to investigate before attacking demonstrates the correct protocol: righteous fury tempered by inquiry. The Zohar (III, 214a) identifies Phinehas as the archetype of zealotry channeled through wisdom. His presence ensures that Gevurah (the impulse to destroy the threat) passes through Chokhmah (the demand for understanding) before manifesting as action.
• The eastern tribes' explanation — the altar is a witness, not for sacrifice — reveals a valid fear: that future generations will deny the eastern tribes' membership in Israel. The Zohar (II, 172b) teaches that spiritual identity must be continually reaffirmed against the erosive power of distance and time. The Klipot specialize in severing communities from their spiritual root; the altar-witness is a defensive measure.
• The resolution — the altar is named "Witness" (Ed) and accepted by all — prevents the Sitra Achra's scheme of fratricidal war. The Zohar (III, 127a) teaches that when Israel resolves internal conflict through dialogue rather than violence, it generates a burst of spiritual light that the Klipot cannot tolerate. Unity is the most powerful weapon in the Tzaddik's arsenal; the Other Side's entire strategy depends on division.
• Sanhedrin 110a discusses the crisis when the eastern tribes (Reuben, Gad, and half-Manasseh) built an altar by the Jordan, which the western tribes interpreted as apostasy. The Talmud notes that the western tribes were prepared to go to war against their brothers, demonstrating how seriously they took the prohibition of unauthorized altars. The incident reveals that vigilance against spiritual corruption can itself become a source of conflict.
• Zevachim 119a analyzes the eastern tribes' defense — that the altar was a witness (ed), not for sacrifices — and the Talmud debates whether the altar was halakhically permissible even as a memorial. The sages conclude that the altar was legitimate because it served an educational purpose without violating the prohibition of bamot (unauthorized sacrificial altars). The resolution demonstrates that intent determines the legality of religious objects.
• Sanhedrin 44a records that Phinehas the priest was sent to investigate the altar, and the Talmud praises his diplomatic approach — he questioned before accusing. The sages derive from Phinehas's conduct the principle that even zealots must first seek understanding before acting. This tempering of zealotry would become critical in the Judges period, when hasty action often caused more harm than the original offense.
• Horayot 2b discusses the role of the tribal leaders who accompanied Phinehas, noting that communal decision-making prevented the rash action of a single zealot. The Talmud teaches that matters of war and peace must be decided by a council, not an individual. The near-civil-war over the altar foreshadows the actual civil war against Benjamin in Judges 19-21.
• Bava Batra 118b revisits the trans-Jordan tribes' unique status, noting that their voluntary participation in the western conquest earned them the right to return east without stigma. The Talmud teaches that the Jordan River was not merely a geographical boundary but a spiritual one, and those who lived east of it had to make additional efforts to maintain connection with the central sanctuary. The altar controversy illustrates the centrifugal forces that would eventually fragment Israel.