adiaphorism
/ˌadɪˈafərɪz(ə)m/noun
Adiaphoristic beliefs or principles; latitude or indifference in religious matters; indifferentism, latitudinarianism; an instance of this.
Origin
Early 17th century; earliest use found in Robert Parker (?1564–1614), religious controversialist. From post-classical Latin adiaphorismus from adiaphorus indifferent + -ismus.