Fundamentalism

Fundamentalism is a tendency among certain groups and individuals that is characterized by the application of a strict literal interpretation to scriptures, dogmas, or ideologies, along with a strong belief in the importance of distinguishing one's ingroup and outgroup, which leads to an emphasis on some conception of "purity", and a desire to return to a previous ideal from which advocates believe members have strayed. The term is usually used in the context of religion to indicate an unwavering attachment to a set of irreducible beliefs (the "fundamentals").

strong belief in the ability of unregulated laissez-faire or free market policies to solve most economic and social problems

Ultraconservatism refers to extreme conservative views in politics or religious practice. In modern politics, ultraconservative usually refers to conservatives of the far-right on the political spectrum, comprising groups or individuals who are located to the right of those who hold mainstream conservative views, and continuing further right to include fringe parties.

Exclusivism is the practice of being exclusive, a mentality characterized by the disregard for opinions and ideas which are different from one's own, or the practice of organizing entities into groups by excluding those entities which possess certain traits.