Your positioning yourself on the intellectual high ground here is baseless. Perhaps you could educate yourself and read the Anglican Elizabethan Homilies on the Perils of Idolatry (certainly not representative of American protestantism), or perhaps Bevan's Holy Images, to see that what you attributed to "American Protestants" goes back to the earliest ages of the church. Disagree with the conclusions all you like, but don't indulge in caricatures while doing so.
It's actually the RC who is often ignorant of what paganism was, claiming, for example, that Catholics are not pagan because they pray to the person behind the image, not the image itself, apparently ignorant of the fact that the ancient Romans claimed the exact same thing. Again, I am not going to be drawn into the implications of this. I am simply stating the fact, so often unknown to Catholics. The Babylonians held the same conception, though that didn't stop the biblical prophets from caricaturing them by stating (though not strictly theologically true from the Babylonian--and Roman Catholic--perspective) that they worshiped the actual material substance of the image.
Opponents of the Church often attempt to discredit Catholicism by attempting to show similarities between it and the beliefs or practices of ancient paganism. This fallacy is frequently committed by Fundamentalists against Catholics, by Seventh-day Adventists, Jehovah’s Witnesses, Mormons, and others against both Protestants and Catholics, and by atheists and skeptics against both Christians and Jews.
Very frequently, the pagan influence fallacy is committed in connection with other fallacies, most notably the
post hoc ergo proper hoc ("After this, therefore because of this") fallacy—e.g., "Some ancient pagans did or believed something millennia ago, therefore any parallel Christian practices and beliefs must be derived from that source." Frequently, a variant on this fallacy is committed in which, as soon as a parallel with something pagan is noted, it is assumed that the pagan counterpart is the more ancient. This variant might be called the
similis hoc ergo propter hoc ("Similar to this, therefore because of this") fallacy.
Whenever one encounters a proposed example of pagan influence, one should demand that its existence be properly documented, not just asserted. The danger of accepting an inaccurate claim is too great. The amount of misinformation in this area is great enough that it is advisable never to accept a reported parallel as true unless it can be
demonstrated from primary source documents or through reliable, scholarly secondary sources. After receiving documentation supporting the claim of a pagan parallel, one should ask a number of questions:
1. Is there a parallel? Frequently, there is not. The claim of a parallel may be erroneous, especially when the documentation provided is based on an old or undisclosed source.
2. Is the parallel dependent or independent? Even if there is a pagan parallel, that does not mean that there is a causal relationship involved. Two groups may develop similar beliefs, practices, and artifacts totally independently of each other. The idea that similar forms are always the result of diffusion from a common source has long been rejected by archaeology and anthropology, and for very good reason: Humans are similar to each other and live in similar (i.e., terrestrial) environments, leading them to have similar cultural artifacts and views.
3. Is the parallel antecedent or consequent? Even if there is a pagan parallel that is causally related to a non-pagan counterpart, this does not establish which gave rise to the other.
4. Is the parallel treated positively, neutrally, or negatively? Even if there is a pagan parallel to a non-pagan counterpart, that does not mean that the item or concept was enthusiastically or uncritically accepted by non-pagans. One must ask how they regarded it. Did they regard it as something positive, neutral, or negative?
Similarly, the early Christians who adopted the cross as a symbol did not do so because it was a pagan religious symbol (the pagan cultures which use it as a symbol, notably in East Asia and the Americas, had no influence on the early Christians). The cross was used as a Christian symbol because Christ died on a cross—his execution being regarded as a bad thing in itself, in fact, an infinite injustice—but one from which he brought life for the world.
Christians did not adopt it because it was a pagan symbol they liked and wanted to copy.
Ultimately, all attempts to prove Catholicism "pagan" fail. Catholic doctrines are neither borrowed from the mystery religions nor introduced from pagans after the conversion of Constantine. To make a charge of paganism stick, one must be able to show more than a similarity between something in the Church and something in the non-Christian world. One must be able to demonstrate a legitimate connection between the two, showing clearly that one is a result of the other, and that there is something wrong with the non-Christian item.
In the final analysis, nobody has been able to prove these things regarding a doctrine of the Catholic faith, or even its officially authorized practices. The charge of paganism just doesn’t work.
Is Catholicism Pagan? | Catholic Answers