For the last two decades Maulana Yusuf had been engaged in a scholarly exposition of Qadiani deception through his writings and lectures.
Kwa kipindi cha miongo miwili iliyopita Sheikh Yusuf alikuwa akijishughulisha na kazi ya kitaaluma ya kufichuwa uongo wa Makadiani kwa njiya ya maandiko na mihadhara.