As a catholic, I'd say the reason is probably poor catechesis or religious instruction. Starting from the very beginning with the parents and God parents. Then through the church classes and yes even the Masses or Divine Liturgies if their not explained properly they can drive some away. Then you add the scandals within the church and the mistaken attitude that one form of Christianity is the same as another take the terms orthodoxy and heterodoxy. All of these can and probably do contribute to the exodus of some to Islam. I really don't understand revert though. To revert is to come back to a previous state from somewhere\something else. I think convert is the term most appropriate here.
peace be with you.
gmcbroom
peace be with you.
gmcbroom