[flevit]

then eugenics/genocide is also competely natural part of evolution just 'environmental variables'.

I take that wording to mean, they saw it interfered (egocentric none the less) by selecting (sematics???)against their population leading them into extinction...and took active role to be the 'superior' race.

[Dimensio]

then eugenics/genocide is also competely natural part of evolution just 'environmental variables'.

Correct, though it is more accurate to note that eugenics is "natural" by the standards of biological science in general. However, it is incorrect to suggest that eugenics is necessary according to the theory of evoluion, and it is also incorrect to suggest that eugenics somehow "helps" the process of evolution. Evolution cannot be used to derive a moral value judgement of any kind for the practice of eugenics or for anything else.

[Dimensio]

I take that wording to mean, they saw it interfered (egocentric none the less) by selecting (sematics???)against their population leading them into extinction...and took active role to be the 'superior' race.

There exists no evidence that an abscence of a eugenics program will result in the extinction of the human race, thus such reasoning is not logically justified.