When you start out with an invalid premise everything that follows is invalid.
Then go ahead and deny that Scripture is a second class authority at best for Rome, and see how far you get. .
You want to quote Catholic teaching great it would do no harm and might do some good. But don't misquote it.
I have referenced Catholic teaching which contradicts you, so do you deny that Catholic teaching see Mormons as Prots, and even as Christians?
Catholics believe that the faith is on a three legged base. Bible, Sacred Tradition, and the Magisterium, all EQUAL
Wrong, and a fundamental error, as Scripture and Sacred Tradition only consists of what Rome decrees they are and only authoritatively mean what she says they mean, and thus she is effectively the supreme authority.
And under Roman reasoning, God is the source of both Scripture and RC teaching, the latter defining the former, and thus it is simply impossible for there to be any conflict.
Catholic doctrine, as authoritatively proposed by the Church, should be held as the supreme law; for, seeing that the same God is the author both of the Sacred Books and of the doctrine committed to the Church... it follows that all interpretation is foolish and false which either makes the sacred writers disagree one with another, or is opposed to the doctrine of the Church. - (Providentissimus Deus; http://www.vatican.va/holy_father/leo_xiii/encyclicals/documents/hf_l-xiii_enc_18111893_providentissimus-deus_en.html)
But which she is the autocratic judge of. For indeed, Rome has presumed to infallibly declare she is and will be perpetually infallible whenever she speaks in accordance with her infallibly defined (scope and subject-based) formula, which renders her declaration that she is infallible, to be infallible, as well as all else she accordingly declares.
Thus when faced with challenges, no less than Bellarmine argues,
It was the charge of the Reformers that the Catholic doctrines were not primitive, and their pretension was to revert to antiquity. But the appeal to antiquity is both a treason and a heresy. It is a treason because it rejects the Divine voice of the Church at this hour, and a heresy because it denies that voice to be Divine... may say in strict truth that the Church has no antiquity. It rests upon its own supernatural and perpetual consciousness. Its past is present with it, for both are one to a mind which is immutable. Primitive and modern are predicates, not of truth, but of ourselves...The only Divine evidence to us of what was primitive is the witness and voice of the Church at this hour." — Most Rev. Dr. Henry Edward Cardinal Manning, Lord Archbishop of Westminster, “The Temporal Mission of the Holy Ghost: Or Reason and Revelation,” (New York: J.P. Kenedy & Sons, originally written 1865, reprinted with no date), pp. 227-228. .
And thus as Keating asserts,
The mere fact that the Church teaches the doctrine of the Assumption as definitely true is a guarantee that it is true. ” — Karl Keating, Catholicism and Fundamentalism (San Francisco: Ignatius, 1988), p. 275.[http://www.catholic.com/tracts/immaculate-conception-and-assumption]
Thus you are not to objectively search the Scriptures as a faithful RC in order to ascertain the veracity of official RC teaching, but instead your assurance rests upon the premise of the assured veracity of Rome. Which excludes any from correcting her official doctrine.
It follows that the Church is essentially an unequal society, that is, a society comprising two categories of per sons, the Pastors and the flock, those who occupy a rank in the different degrees of the hierarchy and the multitude of the faithful. So distinct are these categories that with the pastoral body only rests the necessary right and authority for promoting the end of the society and directing all its members towards that end; the one duty of the multitude is to allow themselves to be led, and, like a docile flock, to follow the Pastors. - VEHEMENTER NOS, an Encyclical of Pope Pius X promulgated on February 11, 1906:
“Absolute, immediate, and unfaltering submission to the teaching of God's Church on matters of faith and morals-----this is what all must give..” “The Vicar of Christ is the Vicar of God; to us the voice of the Pope is the voice of God. This, too, is why Catholics would never dream of calling in question the utterance of a priest in expounding Christian doctrine according to the teaching of the Church;”
“The Vicar of Christ is the Vicar of God; to us the voice of the Pope is the voice of God. This, too, is why Catholics would never dream of calling in question the utterance of a priest in expounding Christian doctrine according to the teaching of the Church;”
“He is as sure of a truth when declared by the Catholic Church as he would be if he saw Jesus Christ standing before him and heard Him declaring it with His Own Divine lips.” —“Henry G. Graham, "What Faith Really Means", (Nihil Obstat:C. SCHUT, S. T.D., Censor Deputatus, Imprimatur: EDM. CANONICUS SURMONT, D.D.,Vicarius Generalis. WESTMONASTERII, Die 30 Septembris, 1914 ); http://www.catholictradition.org/Tradition/faith2-10.htm]
But which premise was not how the church began. Now i am sure you can spin what Rome has said, or even find some things that may seem to contradict it out of the preponderance of published papist prolixity, but the fact remains that your assurance rests upon the premise of the assured veracity of Rome which she clams for herself, not the weight of Scriptural substantiation.
Learn to read what I wrote not what you wish I had wrote.