One can't imagine youthful (second generation) Nazi scientists being content with merely removing the hair, teeth and skin from all the world's 'unfit', before burning their bodies for fuel, in the manner it was done way back in papa's day.
Instead these 'impure' bodies would be burned in high tech, high temperature atomic refineries.
There second generation Nazi physicists would ensure that these 'unfit' bodies would be reduced down (again that quintessential Modernity concept) to pure simple atoms.
Then each element's atoms would be collected separately, using the same technique that separated and gathered the fissionable uranium for the Bomb.
These pure atoms could then be be reassembled by second generation Nazi chemists into any synthetic material their blond beastly minds could imagine : artificial foodstuffs, in the form of 'Fuhrer Burgers', even.
What the Nazis and their kin would be so willing to do with all the humans that failed 'out of the medals' in The Race of Progress, other youthful modern elites would be even more eager to do to Nature.
For let us look at the visual material that helped formed the intellectual world of these second generation modernity elites : the futuristic illustrations from all the world's Science fiction magazines and Popular Science non-fiction magazines.
Near universally they display future human existence as consisting of living under vast glass domes on barren planets devoid of anything green or of any animal and insect.
(And certainly no microbes either).
No shade trees because shade is now better provided for by artificial means. And besides shade trees were potential enemies competing for the valuable trace elements in the rocky soil of this planet that are better converted into the substances that humans really want.
So any new planet invaded by Aryan Man would be quickly stripped of anything biological that might form a threat or be a competitor for the planet's valuable minerals and energy sources.
Modernity's Aryan Man is just so smart, the Future's gotta get out of his way or at least hide in the shadows and wear Shades.
No need anymore for humanity (what's left of it, after the Great Winnowing of the unfit) to modestly live commensal-style within Nature.
No need to supplicant oneself and gracefully accept good ideas coming from anywhere and everywhere, be it Jewish science, Roma music or microbial antibiotics.
For Hubris and Scientism be the only gods now ...