Any fundamentalist--Right or Left, religious, political, interest, whatever--is distinguished by A) INORDINATE or B) SCRUPULOUS

. Unquestioned and unquestioning submission to authority
. Obsessive fear of punishment and other reprisal
. Group-think
. Homogenized activities
. Strict hierarchy of bosses
. Inside spies commissioned to report deviant behavior 
. Absence of permitted dissent
. Compliance codes
. Shaming of others
. Bullying
. Disdain for the world outside of the organization
. Banned books, movies, lectures, articles, etc.
.  Frequent formal and public declarations of assent
. Loss of conscience rights
. Outright disdain for subtlety, ambiguity, or nuance
. Moral superiority of gender, title, pedigree, credential, or rank
. "We are Right; the rest are Wrong" claims of access to Truth
. Brand lexicons, terms, and symbols unilaterally granted to only us
. Erasing of trust in others
. Prohibitions against internal debate
. Literal rules on using passions and emotions to love.