The example of anthropogenic global warming is quite instructive: even though it is a plainly a proper scientific theory in Popper's sense--it is easily falsifiable by numerous conceivable observations, indeed has been falsified by data pointed to in the article--it has become what might be called 'sociologically unfalsifiable'. Its adherents won't accept as valid any countervailing evidence and vilify critics.
Whatever its merits as science, the neo-Darwinian concensus, has become 'sociologically unfalsifiable' because it now functions as an atheistic creation myth for radical secularists. "Evolution zealots" are those for whom it has become such a dogma, not those who simply believe it is the best currently available account of the origin of biological diversity: folks like Dawkins who attacked Gould for applying dynamical systems theory to evolutionary biology because it removed the gradualist element, or like those who disrupt talks about reverse transciptase because the existence of such enzymes unseats the uni-directional connection between DNA and RNA.
Uhh no it isn't. It's based on computer models. Satellite data show no global warming. The temperature curves that purport to show global warming have been doctored only to show those segments that fit the (false) hypothesis.