I read it a couple of times, and it seems purposely opaque to me. At a guess, I think it's their old trope about science being just another religion, and if it is, they can stuff it up an archaeopteryx's bunghole.
The second sentence has some mix truths and some leading assumptions.
NHC
I agree, it seems likely that archaeopteryx would have had a cloaca, with a vent rather than a true bunghole, and that they should therefore stuff their trope (about science being another religion) up that.
It is certainly the case that archaeopteryx had a complex alimentary canal, and that those who claim that science is a religion deserve to have their opinions (and wherever practical, themselves) forcibly inserted into the terminal orifice of that canal; But the use of the term "bunghole" does (for most modern non-biologist readers) create a misleading and potentially erroneous assumption that a specific orifice for the elimination of faeces, separate from orifices used to eliminate uric acid, and/or for the transfer of spermatazoa and laying of eggs.
As an early ancestor of
aves, it would be highly unlikely that archaeopteryx would display such differentiation of faecal, urinary, and genital orifices, and for the avoidance of confusion it is therefore wise to specify, for general audiences, that the orifice into which insertion of the claim should be performed is the vent, leading to the cloaca.
From a lingustic perspective, one might argue that the vernacular "bunghole", when applied to the
avialae (the clade that includes therapod dinosaurs along with
aves), necessarily implies "vent/cloaca", rather than the more traditional implication of "anus"; However the public at large may be unaware of the detailed anatomy of this clade, and as further misinformation, (even as an implicitly rather than explicitly inaccurate claim) is to be avoided, I concur with the implied argument that we should tell creationists "stuff it up an archaeopteryx's cloaca" (or more pedantically "stuff it up an archaeopteryx's vent"), thereby avoiding confusion.
Many, in a general audience, may however be unfamiliar with the word "cloaca", and so it would be appropriate to elaborate by providing a brief account of the key differences between a vent/cloaca and a true bunghole (as typified by the anus found in
mammalia), thereby turning the discourse into a teaching moment.
On a similar note, we should also resile from the anatomically highly improbable recommendation that creationists "can go fuck themselves", as the morphology of the urinogential apparatus in
homo sapiens typically renders such an act impossible; While significant variation of urinogential configuration is observed in this species, such that the possibility may exist for a small subset of individuals, it is highly unlikely that any given creationist would be suitably equipped.
This is doubly true in the hypothesised case that male creationists show a displacement of their penes to the cranial region, as summarised by the common phrase "all creationists are dick-heads". A cranial site for the penis has yet to be specifically observed, but even if it were shown to occur, it would non significantly increase the subject's ability to fuck himself, given the well attested limits to the curvature that can be applied to a human spine. Again, small numbers of individuals may be exceptional in this regard, but it would be unwise to assume that a given, randomly selected, creationist was amongst their number.
In summary, while they
can shove their opinion up an archaeopteryx's bunghole, it should be clarified that the vent and/or cloaca, and not an anus
per se, is the specific orifice in question; And while they
should go fuck themselves, this act is unlikely to be physiologically possible, and it would therefore be incorrect to assert that they
can.