"At some future period, not very distant as measured by centuries, the civilised races of man will almost certainly exterminate, and replace the savage races [Australians and black people] throughout the world. At the same time the anthropomorphous apes [reference to black people]… will hopefully be exterminated. The break between man and his nearest allies will then be wider, for it will intervene between man in a more civilised state, as we may hope, EVEN THAN the Caucasian [wow, can you believe he suggested something could be more superior than Caucasian?], and some ape as low as a baboon, instead of as now between the n3gro or Australian and the gorilla."
We see that Hitler fulfilled this prophecy by eliminating the unfit (Jews)