Every Pakistani who believes in mutual respect and decency would have been in shock to read the language recently used by Shahbaz Sharif – chief minister of Punjab against President Asif Ali Zardari in public. One has every right to criticize policies of the President but he has no right to insult or use the highly objectionable or derogatory language against respected office of the President where an elected person is already sitting.  MOHAMMAD KHAN SIAL,  Karachi, March 20.