On a visit to Karachi in 2011, I witnessed a surprising spectacle. Imran Khan, Pakistanā€™s legendry cricketer, was in town. His Pakistan Tehreek-e-Insaf (PTI) party was holding a rally in the shadow of Quaid-e-Azam Mazar, the mausoleum that houses the tomb of Mohammad Ali Jinnah, the founder of the nation.