Arabic is easy to learn and the Koran is all you need to know to practise arabic. Malaysians learn the koran in arabic so why not pakistanis?
The rest of it is shear indoctrination of course. As far as Catholics and the latin mass is concerned, reading at all was highy discouraged except for priests and being able to read and own a book that was not the bible was a burning offence.
thanx,
bill