They are impervious. And what is their entire point? That Southwind's analogy doesn't work? It does. The nozzle example is well known. If someone likens evolution to the 747 in the junkyard you can point out that it is quite different... that, in fact, the 747 itself "evolved"....that all planes are based on the first plane-- that evolution is about furthering that which "works best" in the environment it finds itself in.
They think it's confusing... but it's because they don't understand. It truly is not confusing to the majority. That is why people like Dawkins, Jones, Ridley, et. al. use it. That is why AI models itself on it... that is what biomimicry is about. Understanding it unlocks further understanding. But Mijo cannot understand (of course he insists that evolution is random), and I don't think that others who don't comprehend at this point ever will. And yet the internet and the world is full of people who can and do see the similarities and teach others using such analogies. I'm not sure anything would work on a hard core creationist since not anything seems to be able to break the impenetrable shield of the non-creationists who think they understand evolution, but can't seem to convey a cohesive understanding of how the complexity we see came about.