Most if not all Khalistan groups were infiltrated and manipulated, whether we like to admit it or not. Apparently Parmar may have been an agent himself, If he was an agent he very might still be alive somewhere.
Unless we are willing to argue and prove Parmar was not a terrorist we shouldn't be having his photos up everywhere, same goes with other Sikhs who were involved in the Khalistan Movement.
Khalistanis certainly need to improve their PR image, if they want to be taken seriously.