This is a non sequitur. Coherent in sense A does not imply coherent in sense B. They're a 'coherent' group of users of technical terms in so far as they are biologists, not racists and sexists.
The racism and sexism are not justified by the actual science. If anyone tells you they are, they are full of shit. I don't know how many times I've said this.
It's possible to be a complete nut and do good science. Witness Newton. For that matter apparently good old Einstein (such a lovely man, such a pacifist etc) communicated with his wife with written notes the content of which was the nice middle-class equivalent of 'make sure I get clean linen every day, bitch.' (I'm not vouching for this - it's a story I heard.)
Like Carrol you don't usually fuck things up, so what else is it you might mean here?
Eric