I have seen interviews with Bhaghat Singh's relatives and I also know of his descendents in the Namasher area. They confirm he was a commited Atheist. He also rejected his caste/racial alliegance too. I think is his heart his principles were of a good Sikh, however, he saw our people bickering over ritualism, hence his outward renounciation of religion. I stuill think he was spiritually motivated by the Sikh ethos, of Equality, Freedom, Justice.