assalamu alaikum dr naik,dusre mazahib ka kwoledge to achcha rakhte he lekin islamic ilm like fiqh,arabic etc me normal ilm bhi nahi rakhte us ka subut is link ko dehye http://www.youtube.com/watch?v=mlzQSkqkO1o k jab vo convert hone walo ko kalimah parha rahe he to kitni saaf or vazeh galti kar rahe he,normally arabic parha hua bhi itni badi galti nahi kr sakta,kabhi vo yazid ko razi allahu anhu keht he, after all vo dusre mazahib me achcha kaam kr rahe he.allah sab ko sidha rasta dikhaye