We all know the Dogma of the Trinity. Three Persons - Father, Son and Holy Ghost - in one God. It would of course be heresy for a pope and/or council to proclaim that "The Dogma of the Trinity is false."
That may or may not have happened here, but even if not, then what has happened would be the equivalent of a "merely" disciplinary mandate that "The Dogma of the Trinity shall henceforth not be taught in any form in any Catholic seminaries, parishes, catechism courses, or retreats."
Hey, we didn't say it was false, just that it couldn't be taught in these places, so technically this is not a heresy. Technically, this could occur in the Church, legally and doctrinally speaking.
I have no doubt that those of a CUF/Wanderer outlook, ever anxious to put as Catholic a spin as possible even on what is patently anti-Catholic would no doubt think of some obscure and isolated exception to the list - since it states that the Trinity is not to be taught here, here, here, and here, then it must mean that only in some other place, "over HERE alone, is to be the proper forum for elucidation of the Dogma of the Trinity, thus focusing it like a laser beam..."
Never mind the more obvious understanding that "HERE" was omitted from the list merely through negligence rather than intended exception.
I could even see them going on to say "Besides, with the Dogma of the Trinity formerly being explained in all these different places, might not the people have been confused when one understanding is conveyed in the seminary, another from the pulpit, and yet others by the various catechists? Better to focus it all in one single place over HERE where we can therefore get it exactly right."
For a season, the Trinity might even be discussed in this HERE forum, thanks to the flagging efforts of the CUF/Wanderer types, but it just won't take root, and before long, through attrition, lack of interest and response, and finally the (purely verbal) order that comes down (from no one quite knows where) that the Trinity will no longer be discussed HERE either, what little formal "approved" presentation of the Trinity altogether ceases.
Of course, the secular press would see it more for what it really is (but with its own imprecisions): "CHUCH REPUDIATES TRINITY DOGMA," the headlines read.
The general run of Catholic society, far more likely to read their newspaper than the Pastoral and Homiletic Review where such distinctions might have been clarified, really believe that the Dogma of the Trinity has really been done away with, along with all that other non-ecumenical stuff such as Mary, Purgatory, and Inquisitions. Liberals and secularists and deists would all hail this remarkable step forward taken by the Church while truly devout Catholics who continue to believe in the Trinity and teach about it (clergy and laity alike) are gradually shunned, exiled, put out to pasture, or even excommunicated, especially when they attempt to ordain or consecrate Trinitarian clergy.
Finally, the question even comes up, "Well gee, if the pope denies the Dogma of the Trinity, does that not make him a heretic and therefore possibly not a pope?" And others reply "Well, he didn't actually deny it," or "no pope can bind another pope," or "what the popes formerly promulgated to the Universal Church was only for their times and circumstances and do not apply to modern times," or even "this was a pastoral decision to make the concept of God easier for modern man to understand," and so on it goes,adding further to the confusion.
Does it matter that the man personally does not believe in it, and consciously labors against it, for example by only appointing anti-trinitarian bishops, especially if he has expressed some sympathy for some (not all) of those who do believe in it?
Does any of this sound familiar? The only real difference here is that instead of a well-known Dogma (the Trinity), we are dealing with far less familiar and lesser-known dogmas and doctrines, such as the exclusive salvific claim of the Church, or the merits of the saints, the details of authentic sacramental theology, and so forth, things the ordinary Joe Sixpack has never even heard of (or wasn't paying any attention to when he sat in catechism class as a child).