New Delhi, Mar 03 (ANI): Taking a jibe over the Tamil Nadu government's letter to the Centre demanding release of former prime minister Rajiv Gandhi killers, Bharatiya Janata Party (BJP) leader Subramanian Swamy said the letter by Tamil Nadu to the Centre is a venture of "anti-nationalism", thus concluding it to be a complete disgrace to the people of India, and people of Tamil Nadu particularly. He further stated that such an activity by Tamil Nadu government is a complete reckless disregard to the Constitution of India.