> We need to stop reeling off Godwin's law straw-man arguments against Eugenics

This is one of the few cases in which Godwin's Law probably doesn't apply. The implementations of the National Socialist Party by themselves are an excellent argument against eugenics of any sort.

Meanwhile, it is worth mentioning here that Winston Churchill, while a "national hero" to some people, was unusually strongly racist even for his time. http://www.independent.co.uk/news/uk/politics/not-his-finest...