He didn’t write polemics in a vacuum. Luther didn’t happen in a vacuum. Some here will say he should have recanted, he should have submitted. That lets Rome off the hook for a betrayal of its authority and leadership. There were polemics written about Luther, too. There were reformers who were executed. There were overtly corrupt practices in Central Europe. There were reforms the Church actually accepted.The Church survived many crises over the millennia. The breaking point in the West was when Luther was excommunicated in 1521, after writing vicious polemics against the Church and inciting the German princes to rise up against the Church; and then proceeded to build his movement in opposition to the Church.
Point: both sides were at fault. If we spend time now blaming the other side, that undermines any actions toward unity.
If both sides were to blame, how is Rome not responsible? Both sides were responsible. We Are responsible if we point fingers of blame at the other 500 years later.Granted that both sides were to blame for the Protestant revolt; but how can you say that Rome is responsible for division in God’s Church?
What is denied is what the reformers viewed as later innovations, not particularly the early Church. It was their view that, if Tradition and scripture teach the same truths, then new teachings must be evaluated against scripture.Scripture and Tradition is indissolubly intertwined and mutually supportive. Neither can exist without the other or contradict the other. The Magisterium serves the Word of God by faithfully studying the Word and declares as needed. You raised a straw man.
As for the early Church and the councils; none of which taught Sola Fide or Sola Scriptura or denied/attacked papal authority.
The single most divisive one is universal justification, which exists neither in the early Church or scripture. Objections to that claim predate the Reformation by 500 years.
Universal jurisdiction is not a defense of the Church. Infallibility ex cathedra is not a defense of the Church. These are changes from primacy of the Bishop of Rome to supremacy of the Bishop of Rome, not found in scripture or the early Church.The development of Catholic doctrine, from either explicit statements in Scripture or from kernel form and in Tradition; has been mainly in defense of Holy Mother Church against heresies and was carefully worked out over centuries.