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.
The nineteenth century witnessed a flowering of this
"pagan influence fallacy." Publications such as
The Two Babylons by Alexander Hislop (the classic English text charging the Catholic Church with paganism) paved the way for generations of antagonism towards the Church...
The pagan influence fallacy has not gone away in the twentieth century, but newer archaeology and more mature scholarship have diminished its influence. Yet there are still many committing it.
The pagan influence fallacy is committed when one charges that a particular religion, belief, or practice is of pagan origin or has been influenced by paganism and is therefore false, wrong, tainted, or to be repudiated. In this minimal form, the pagan influence fallacy is a subcase of the genetic fallacy, which
improperly judges a thing based on its history or origins rather than on its own merits (e.g., "No one should use this medicine because it was invented by a drunkard and adulterer"). (this is what Job does) There are 38 obelisks in the United States.
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.
When the pagan influence fallacy is encountered, it should be pointed out that it is, in fact, a fallacy.
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.
For example, Fundamentalists have made much of the fact that Catholic art includes Madonna and Child images and that non-Christian art, all over the world, also frequently includes mother and child images. There is nothing sinister in this. The fact is that,
in every culture, there are mothers who hold their children! Sometimes this gets represented in art, including religious art, and it especially is used when a work of art is being done to show the motherhood of an individual. Mother-with child-images do not need to be explained by a theory of diffusion from a common, pagan religious source (such as Hislop’s suggestion that such images stem from representations of Semiramis holding Tammuz). One need look no further than the fact that mothers holding children is a universal feature of human experience and a convenient way for artists to represent motherhood.
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.
("pope" Hislop says all crosses are satanic, and continues to influence Bible cults)
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. The obelisk in St. Peter's Square clearly fails the "pagan" test, and it was never more than a soap box for the ego of a Roman politician. Bigots can't be educated.
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