Noun
One who favor or practices any from of exclusiveness or exclusivism.
Source: Webster's dictionaryNothing has done more to separate and divide human beings one from another than exclusivist organized religion. Neale Donald Walsch
I don't think Jesus was an exclusivist. He said, and we believe, that He is the unique representation of God in the world. But that doesn't mean this is the only way God can work. Andrew Greeley
Exclusivist religions teach that theirs is the only way to salvation and to religious truth, and some of them would even argue that it is necessary to suppress the falsehoods taught by other religions. Source: Internet