There are two different ways of going wrong, not just one.
Protestants subtract from the Tradition and add new principles of interpretation.
Ultra-dogmatic Catholics treat as dogma what is not dogma. They are hyper-Catholic, hyper-dogmatic, or ultra-dogmatic.
They take private revelations as dogma, and seek to impose their peculiar interpretations of the Tradition on other Catholics.
They set aside the recent actions of the Magisterium--especially Vatican II--based on their interpretation of less-authoritative actions of Roman institutions (e.g., the guidelines issued by the Pontifical Biblical Commission in 1903).
Bouyer calls this "integrism"--a type of conservatism that wants to preserve every jot and tittle of the tradition.
- "Bad Religion: The Fatal Theological Errors of the New Geocentrists," Catholic Answers Magazine, May-June 2015, 9-13.]
- Karl Keating, The New Geocentrists