Physician and Sikh activist Dr Prabhjot Singh has invited about two dozen people who attacked him, mistaking him to be a Muslim and calling him Osama bin Laden, to his home and gurdwara so that they can learn about Singh's faith.
A Sikh professor at Columbia University was allegedly attacked by a group of men, who called him "Osama" and "terrorist", in an assault which police are investigating as a hate crime.