I believe the term you were searching for was "Social Darwinists" or possibly "Eugenicists".
Well if her evolutionary believers comment is a throwback to the Nazi's raced based ideology it would be a stretch to call the progenitors of those policies Darwinists of any cloth, since their beliefs had little to do with any science. Instead they were goofy notions based on rantings of Liebenfels, who discovered the truth of Aryan superiority by gazing at a knight's templar tombstone. It would be as funny as David Icke's nonsense if the whole thing didn't lead to such tragedy.
Nazi race based ideology is much more rooted in the nonsense of popular conspiracy based mysticism most of which are just German offshoots of madame Blavatsky's Theosophy. Blavatsky's own teachings about root races and sunken continents which form the basis of theosophy are not the product of any scholarly or scientific study. They were the musings of Blavatsky's imagination or if you would actually believe her, the scribbling from a magical Atlantean tome that no one other than madame Blavatsky had seen.