broad church
You can refer to an organization, group, or area of activity as a broad church when it includes a wide range of opinions, beliefs, or styles.
Broad Church in American English
a liberal party of the Anglican Church in the late 19th cent.
adjective: pertaining or belonging to a party in the Anglican Church emphasizing a liberal interpretation of ritual
Broad Church in British English
adjective: of or relating to this party in the Church of England
noun: a party within the Church of England which favours a broad and liberal interpretation of Anglican formularies and rubrics and objects to positive definition in theology