It's more 'lets not research it too much further so no-one tries to exterminate an entire race again, only this time with scientific justification'.
"Well, because Chimpanzees are less intelligent than humans, they don't deserve to live, so we can exterminate them."??
That's so obviously bullshit it barely even warrants discussion. Inferiority of a species or even individual does not provide any justification for destroying that species/race/individual.