Answer
(Fatwa: 1165/670/D=1432)
On what basis they are opposing? If the imam is able to recite the holy Quran correctly along with fulfilling all other conditions, then his imamah is alright. It is not a condition for the imam to be Hafiz, only it is better.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband