Protestants reject Jesus when he says
John 17:21:
“That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.”
1 Corinthians 11:18-19
For first of all, when ye come together in the church, I hear that there be divisions among you; and I partly believe it. For there must be also heresies among you, that they which are approved may be made manifest among you.
Matthew 18:15-18
15“If your brother sins, go and show him his fault in private; if he listens to you, you have won your brother. 16“But if he does not listen to you, take one or two more with you, so that BY THE MOUTH OF TWO OR THREE WITNESSES EVERY FACT MAY BE CONFIRMED. 17“If he refuses to listen to them, tell it to the church; and if he refuses to listen even to the church, let him be to you as a Gentile and a tax collector. 18“Truly I say to you, whatever you bind on earth shall have been bound in heaven; and whatever you loose on earth shall have been loosed in heaven.
Protestantism has only begotten schisms and more eggregious heresies such as Unitarianism, Universalism and atheism.
http://www.freerepublic.com/focus/religion/2678253/posts?page=357#357
rogator: “In a manner of speaking it is correct.
Catholics look on diocesan bishops (Catholic and Orthodox) as the successors of the apostles who founded the particular church of their locale. In this manner a person could be a member of the Church of Corinth, Rome, Constantinople, Alexandria, Tucson or Pittsburgh.
Those of us who prefer Roman Catholic (actually Latin Catholic) are emphasizing our connection with the Roman Pontiff rather than the (e.g.) Maronite or the Melkite Patriarch.
Emphasizing the connection with the particular church rather than the Roman Church is IME common among very liberal Catholics and liberal bishops, many of whom actually see Roman Catholic as a derogatory term.”
Not to mention the different flavors of Catholicism such as....... http://en.wikipedia.org/wiki/Sect
Sects
Roman Catholic sects
There are many groups outside the Roman Catholic Church which are regarded as Catholic sects, such as the Community of the Lady of All Nations, the Palmarian Catholic Church, the Philippine Independent Church, the Brazilian Catholic Apostolic Church, the Free Catholic Church, the Movement for the Restoration of the Ten Commandments of God, and others.
The Sodalitium Christianae Vitae started in Lima, Peru, has multiple cases of psychological abuses experienced by youth that were attracted to the movement.[16]
There is also Russian orthodox, Eastern Orthodox, Ukrainian Catholic, Greek Orthodox, Coptic (Egyptian) to name a few more.
They most certainly do not adhere to the doctrinal position established by Rome on a number of fronts which many FRoman Catholics consider critical to Catholic faith.