New Delhi, Feb 15 (ANI): In a biting reply to Bihar Chief Minister Nitish Kumar over his demand of proofs on JNU, Bharatiya Janata Party leader Shrikant Sharma on Monday said why is Nitish quiet on killing of political leaders in Bihar. Sharma said his support to anti-national people residing in JNU is disrespect to the soldiers who died fighting for the country. He added that speaking on JNU issue is Nitish's way of covering up the intolerant activities of his state.