Especially, since the events of September 11, religious, specifically Islamic, fundamentalism has become one of the controversial issues among scholars. In his prominent book, James Barr makes a detailed analysis of Protestant fundamentalism. Two leading characteristics of this kind of fundamentalism are exclusivity and opposition. In this paper, we analyzed these characteristics, and we tested whether these characteristics may be applicable to an Islamic fundamentalist movement or not. More specifically, after making a specific definition of fundamentalism, the main features of Protestant fundamentalism, application of these features to Turkish Hizbullah, the main doctrines of Turkish Hizbullah, and a brief history of the group have been discussed in this paper.