If the Lashon Hara that he speaks results in strengthening or maintaining a dispute then there is another prohibition of "And he shall not be as Korach and as his congregation". The Rambam tells us that despite the verbose and excessive discussions in Chazal about the topic of conflict they have not exhausted the topic in regards to how damaging it really is. The Chofetz Chaim's yeshiva had a big conflict and when he found out about it he spoke for two hours straight about how bitter and terrible it is. He declared "rather 70 yeshivas be shut down or destroyed than I should join any group in this dispute." Hopefully when we gain an awareness of how terrible quarrels are it can motivate us to find a way to distance ourselves.

Chofetz Chaim, Introduction (Lavin)

וְאִם הוּא מַחֲזִיק בַּמַחְלֹקֶת (יב) עַל יְדֵי סִפּוּרוֹ עוֹבֵר עוֹד עַל לָאו (במדבר י"ז ה') דְּ''לֹא יִהְיֶה כְקֹרַח וְכַעֲדָתוֹ'' שֶׁהוּא אַזְהָרָה, שֶׁלֹּא לְהַחֲזִיק בְּמַחְלֹקֶת כִּדְאִיתָא בְּסַנְהֶדְרִין (דף ק"י).

Shemiras HaLashon - Shaar HaZechira (15th Perek)

וְהִנֵּה, אִם בָּאנוּ לְבָאֵר גֹּדֶל הַקִלְקוּל שֶׁל מַחֲלֹקֶת, יִכְלֶה הַזְּמַן וְהֵם לֹא יִכְלוּ, כְּמוֹ שֶׁכָּתַב בְּצַוָּאַת הָרַמְבַּ"ם וְזֶה לְשׁוֹנוֹ: נְבִיאִים נִבְּאוּ וַחֲכָמִים חָכְמוּ וַיּוֹסִיפוּ לְסַפֵּר רָעַת הַמַּחֲלֹקֶת וְלֹא הִגִּיעוּ לְתַכְלִיתָהּ.

Kol Kisvei Chofetz Chaim

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