In An Open Letter, Hizbut Tahrir Pakistan Calls On Pakistani Army To Establish Islamic Caliphate In Pakistan In an open letter, the outlawed Hizbut Tahrir, a splinter organization of the Egyptian Muslim Brotherhood, has urged the Pakistan Army to establish an Islamic caliphate in the country, according to a Pakistani daily. Posted at: February 10, 2011 The full text of this blog post is available to subscribers. Please login or register to request subscription information from MEMRI.