Exclusivism is the practice of being exclusive; mentality characterized by the disregard for opinions and ideas other than one`s own, or the practice of organizing entities into groups by excluding those entities which possess certain traits. (for an opposite example, see essentialism). ==Religious exclusivism== Religious exclusivism asserts that....
• (n.) The act or practice of excluding being exclusive; exclusiveness.
(from the article `Christianity`) During the 20th century, most Christians adopted one of three main points of view. According to exclusivism, there is salvation only for Christians. ...
Ex·clu'siv·ism noun The act or practice of excluding being exclusive; exclusiveness. 
the practice of being exclusive.