Among the Pandavas, Yudhishtir was called Dharmaraj. Why? Because he always was virtuous and would always speak the truth. Being truthful, helping the needy, following the rules, supporting justice, curbing one's greed and caring for others needs are all signs of being religious. Being religious is no sin as made out by certain so called modern and educated and 'secular' people. All people who believe in being good are religious, not secular
