I understand the practice itself predates the religions, however, members of these religions often believe it is part of their religion----including Muslims. Especially where illiteracy is an issue Muslims often believe there are verses in the Quran, hadith, etc., sanctioning the practice (just as Christians believe it's found in the Bible, etc.) My guess is that the problem is compounded in cultures where Arabic is not the common language so even with memorization of Quran people often have incorrect interpretations or understandings.