>Mormons especially target poorly-catechized Catholics.
>”Poorly-catechized Catholics” is yet another “wonderful” (/sarcasm) outcome of Vatican II. Prior to the Second Vatican Council most Catholics were far more knowledgeable about their faith. Many of the older Catholics still are, of course, as well as younger members who undertake a traditional course of study.
This always makes me say “hmmm.” You have an infallible teaching that is leading people astray? Why is this better than Sola Scriptura? No one seems to agree what Vat II really means, so do we need a further infallible interpretation of that teaching?
Asking in truth...
The Second Vatican Council (1963-5) was not intended to be an infallible doctrinal council but was conceived as a “pastoral” renewal of the Church
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Because pastoral pronouncements are neither "true" nor "false", and because they must be expressed in language that is vague and ambiguous, they cannot be the subject of infallibility. Thus it follows that the Holy Ghost simply cannot be solemnly invoked at a strictly pastoral Council, because the pastoral pronouncements could not be infallible anyway. All pastoral pronouncements, even those of Ecumenical Councils which are partly doctrinal and partly pastoral, form part of the Church's day to day Ordinary Magisterium. Thus, what is taught in a pastoral pronouncement is not assured to be infallible.