Unless my memory is failing me, the observers who wrote "Darwin's Finches" made quite an extensive study of all the breeding going on in the Galapagos, including of crossbreeds, and their conclusions were not that the crossbreeds were more highly successful than the purebreeds, contrary to what you've suggested.
As I've already pointed out to you, speciation is largely a distinction of degree, not class. Being able to interbreed marginally is not an empedement to being properly classified as a set of separate species. The distinction is an arbitrary, artificial human one with no distinct, easily recognized, universally accepted boundary.
Are teacup poodles and mastiffs of the same species or distinct species? Depends whether you ask DNA researchers and en vitreo specialists or paleontologists and dog breeders.
Unless my memory is failing me, the observers who wrote "Darwin's Finches" made quite an extensive study of all the breeding going on in the Galapagos, including of crossbreeds, and their conclusions were not that the crossbreeds were more highly successful than the purebreeds, contrary to what you've suggested.
The so called 'scientist' who originally made the claim that these finches proved evolution was made by Percy Lowe in 1936. Evolutionists blindly followed him without bothering to verify the claims because of course it backed up their theory. The refutation came from Peter Grant and his colleagues who observed in 1982 that the various finch breeds produced hybrids. This throws down all the nonsense mentioned by evolutionists about the finches and shows quite well the dishonesty of evolutionists who continue to use this as an example of evolution even after it has been comletely disproven.