The Roman Catholic church is both clergy- controlled and hierarchical, unlike the typical protestant congregation.  And Roman Catholics have elevated clergy-control and hierarchy to the level of dogma and even divine revelation, which prompted many a Reformation-ers misunderstanding and (bloody) conflict.  Since Vatican II, Christian churches with some exceptions have been using Civil Comments, as it were, but many if not most Catholics are still ensconced in their comfort zones and expecting "protestants" to return to communion with the Roman Catholic church, and for "atheists" to submit to the Roman Catholic church and its hierarchy and legal system.  This is not ecumenism, but forced conversion.