[SAI_Peregrinus]

What 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.

[Magnusmaster]

People will value more a life of a human than one of a chimp, and chimps only survive on natural reserves or zoos. That's the fate people who aren't genetically engineered to be smart will face, if they survive.