well brother the problem in our society has been that people like us who have very little knowledge of Quran and Ahadiths start talking negatively about great scholars like Doctor Israr Ahmad ,Doctor Zakir Naik . and establishing Khilafa is not an easy think , it cannot be done while sitting in an airconditioned room of a hotel in Mumbai or Lahore ,it requires extreme struggle and Doctor Israr Ahmad did that through out his lifetime and the rest ALLAH SWT knows best , so we are no one to talk about great scholars like Doctor Israr Ahmad and Doctor Zakir Naik .