Christianity is generally seperated into three major subgroups in the world - Catholic, Orthodox, and Protestant (which includes Anglicans). Of these, Catholicism is the largest (about 1 billion) followed by Protestants (about 800 million). However, in the U.S. read more
Others think that Catholics in general are not Christians but that some Catholics might be Christians in spite of the teachings of their church. Protestant views of Orthodox are generally more accepting of them as Christians (mostly because of their rejection of the papacy), but there are others who believe they are not Christians because of the close similarity to Catholics in the Orthodox liturgy. read more
All Catholics are Christians, but not all Christians are Catholics. A Christian refers to a follower of Jesus Christ who may be a Catholic, Protestant, Gnostic, Mormon, Evangelical, Anglican or Orthodox, or follower of another branch of the religion. read more