Why are Pakistan Generals so hostile to Imran khan ?

Justice Markandey Katju

I have been wondering why the Pakistan army is so hostile to former Prime Minister Imran Khan ? After all, he has overwhelming popular support in Pakistan, as he is regarded as broadly honest, as compared to the PDM leaders who are perceived by the people of Pakistan to be totally corrupt ( as indeed the Panama Papers and other evidence shows ), and his PTI party will sweep the polls if eletions are held ( as all opinion polls indicate ).