A righteous person will oppose wrong even if he is born muslim. In Quran lot of things have been taught which are wrong like- Hate and kill polytheists, donot allow them to repair/ construct their place of worship, donot allow them to ride on horse, donot allow them to celebrate festivals in open etc etc.
Prophet doesnot allow apostate so muslim cannot get converted into other religion. and if he try so prophet ordres his followers to kill him. shud anyone including enlightened muslim support this