Schrodinger's Cat wrote:

Wouldn't it just be a hell of a lot simpler to state that nothing Darwin wrote included the espousing of wholesale genocide of races ?

No, because that leaves open the possibility that belief in Darwinism tends to lead to genocide, regardless of whether Darwin wrote that. Sorry, what is wrong with the very simple, and supported by evidence, statement that Hitler rejected Darwinian evolution and instead was a creationist?

The best refutal of what ( some ) Christians say is to quite simply point out that nowhere does Darwin say " go out and round up inferior races and gas them ".

No, that's not a good "refutal", since it invites the above rejoinder, that Darwin's philosophy tends to leads to that conclusion, regardless of whether Darwin himself went along those lines.