indifferentism

noun

in·​dif·​fer·​ent·​ism in-ˈdi-f(ə-)rən-ˌti-zəm 

-fərn-

: indifference

specifically : belief that all religions are equally valid

indifferentist

in-ˈdi-f(ə-)rən-tist 

-fərn-

noun

Word History

First Known Use

1827, in the meaning defined above