To imply that as a Catholic, I can have greater communion with a separated Christian on the grounds of fuller doctrinal agreement on the few (or many)
remaining doctrinal truths that unite us, relativizes the visible bonds of sacramental communion into mere «juridical» boundaries.
Trent and Vatican I
remain normative for the Catholic faith, but a distinction should be drawn between criticizing their incomplete or unbalanced formulations of the
truth and claiming that these councils formally committed the Church to
doctrinal error.