Speciation within a genus is something that many Creationists and I accept as valid.
I don't argue this point, but since humans and apes are not part of the same species, you have to explain the speciation processes that allowed them to both to development; you must explain macroevolution.
Linnaeus originally classified the chimpanzee in the genus
Homo, you know - and the suggestion has been supported pretty strongly to put 'em back there - or move us to
Pan.
As to "Darwinist," I would certainly think that the main objection from those in these discussions is that it makes it sound like a religion. "Evolutionist" raises my hackles a bit for the same reason. Either is very often used, especially by folks like Answers in Genesis, to try to imply that biologists and we, their groupies
, are merely following some semi-evil religion.