The Rebbe addresses a synagogue dispute over Tachanun recitation that led to public shaming. He emphasizes the prohibition against humiliating others and advises adherence to the synagogue's established Nusach Ari customs, urging peaceful resolution of differences. Additionally, he encourages the attendant to promote communal Torah study and Psalms
https://www.torahrecordings.com/rebbe/igroskodesh/014/005/5101