I certainly know that Roman Catholic is a cult. This movement is against the dogma of Papal Infallibility. The Old Catholic Church has its origins in the Jansenist controversy in the 18th century when a number of churches left the Roman Catholic Church. After the decree of papal infallibility at the First Vatican Council in 1870, a number of other Catholic congregations left the Roman Catholic Church and in 1871 formed the Old Catholic Church. The Old Catholic Church rejects papal infallibility, the immaculate conception of the Virgin Mary, the compulsory celibacy of priests, but insists on the apostolic succession of its priests and bishops.
Bible reading is encouraged among the laity and worship is in the vernacular.
Their doctrinal basis is similar to the various Eastern Orthodox Churches. Whether you consider such groups to be cults depends on your definition of what a cult is. These groups are usually considered by Lutherans to be heterodox Christian churches. I was having a conversation with a Catholic friend who disagrees with some teachings of her religion, and I was wondering if you could tell me some basic Catholic church teachings which are non scriptural, and where in Scripture they are shown to be contrary. The Lord's Supper is one area of difference.