I can understand there being talibanisation in places such as Sohrab goth but there is no talibanisation in other areas of karachi with large pakhtun population such as Keamari, Banaras. I doubt theres any talibanisation in Sohrab Goth too BUT a number of different writers representing different points of view actually claiming there was talibanisation.
Theres no way the whole of Karachi could be talibanised - its a large city with a very diverse population. I personally believe there maybe 2 elements involved:-
thugs belonging to mqm/pakhtun groups who are trying to take control over the city ...drugs, transport, smuggling...from karachi it all becomes internationalised ......mqm population is not increasing as fast as the pakhtun population....
outside interference playing on fears and stoking up the fires of hatred and severely destabilising pakistan in the long-run......theres a lot of ethnic dissatisfaction suddenly surfacing and exploited by outsiders..coupled witht he fact that pakistani authorities and government are severely incompetent and have let the situation brew for 61.5 years.