He was deeply affected by the incident, at Tarn Taran, of 26 January 1921 in which the priests of Darbar Sahib Tarn Taran treacherously attacked a band of Akali reformers led by the Jathedar of Sri Akal Takht who had come for a negotiated settlement with them. Several Akalis were seriously wounded and two of them succumbed to the injuries later. The young and sensitive Bara Singh, disgusted with the acts of the priests within the precincts of the holy shrine, left off his studies and went home. He found the atmosphere in the village charged with commotion at the outrage. Already in that part of the country there had been a lot of resentment at the mismanagement of Gurdwara Janam Asthan at Nankana Sahib in general and the unsavoury personal reputation of its mahant, or custodian, Narain Das.
The happenings at Tarn Taran quickened the tempo of the Akalis* agitation for the removal of the mahant. Two of the six brothers of Bara Singh Pritam Singh and Samma Singh had already registered themselves as volunteers in the jatha of Bhai Lachhman Singh of Dharovali, a local Akali leader. It so happened^that when an urgent call came on 19 February 1921 for them to report for active duty, Pritam Singh was away visiting some relatives. Bara Singh at once decided to take his place and immediately left with Samma Singh for Dharovali. Both were brutally done to death along with the rest of the jatha after their entry into Gurdwara Janam Asthan on the morning of 20 February 1921. See NANKANA SAHIB MASSACRE
1. Shamsher, Gurbakhsh Singh, Shahidi Jivan. Nankana Sahib, 1938