I didn't see the logic in making it exclusive to "Darwin's disciples" (assuming that simply means anyone who doesn't diagree with the theory - I could be wrong about that, but the terminology is kind of ambiguous).
Well of course this phenomenon is not exclusive to Darwin's "disciples."
By "disciple" in the Darwinian case I mean a person who sees in Darwin's theory more than it claims to hold. The theory is not an origin-of-life theory; it is a theory of speciation and evolutionary change in species. It starts with organisms that are already alive. There's nothing in the theory that explains what life "is" or how it came about. And yet the disciple is attracted by the fact that Darwin's theory is relentlessly "naturalistic," materialistic, and effectively claims that the biological sphere is, in the words of Jacques Monod, the result of pure, blind, random chance. Therefore, the origin of life must be likewise.
The disciple is happy, because with this strategy he has succeeded in finding, as Richard Dawkins put it, that he, too, can be an intellectually satisfied atheist.... [The entire point of the exercise is to kick God out of the picture.]
What this has to do with the natural world — or even with science — is another question entirely.