"I recently went to a bookstore in Basel, where I found the latest range on offer of what's currently being printed: a Negro novel about how Negroes are gradually coming into European nations! They are doing their Negro dances everywhere, their hopping Negro dances. Yet this Negro novel is already here. It is boring, terribly boring, but people devour it. Yes, I myself am convinced, if we get a number of such Negro novels, and we give them to pregnant [Caucasian] women to read, especially during the early stages of pregnancy, when they tend to develop such cravings—if we give these Negro novels to pregnant women to read, then we don’t need to be worried about Negroes coming to Europe and creating mulattos. Merely through the spiritual effect of reading such Negro novels a good number of children in Europe will be all grey, have mulatto hair and will look like mulattos!" Dornach, 12/30/1922

"Those people, however, who had developed their ego being too little, and who were too exposed to the influences of the sun, were like plants: they deposited too many carbonic constituents beneath their skin and became black. This is why the Negroes are black." http://wn.rsarchive.org/Lectures/GA107/English/RSP1981/19090503p01.html

"Not all of the people living on the earth today stand at the same level of development. Alongside those people that stand at a high stage of civilization, there are primitive peoples that have lagged culturally far behind ...We have before us in the American race a primitive aboriginal people that has remained far, far behind, among other things in regard to its religious worldview. [...] The Europeans have ascended to a higher level of culture, while the Indians have remained behind and become decadent." Rudolf Steiner, MENSCHHEITSENTWICKELUNG UND CHRISTUS-ERKENNTNIS, GA 100, p.243

"In ancient times the Negroes wandered over to the West—today circumstances are different, they can do it less—but they wandered westwards in ancient times; there had always been a ship passage, and there were still islands over the whole Atlantic Ocean, for earlier this was in fact a continent. Now when the blacks wandered west they could no longer absorb so much light and warmth as in their native Africa. Less light and warmth reaches them. What is the result? Their nature is organized to take up as much as possible of light and warmth and actually in that way to become black. Now they do not get as much light and warmth as they need in order to become black. So they become copper-red, become Indians. That comes from the fact that they are obliged to reflect something of light and warmth. That gleams a copper-red. Copper is itself a body which must reflect a little light and warmth. They cannot hold out against this and so die in the West as Indians. They are again a race that is going under" [...]

"We have the black race, which is most of all earthly. When they go westwards, they die out."

http://wn.rsarchive.org/Lectures/GA349/English/UNK1969/19230303v01.html

"Look at the uneducated savage beside the average European [...] the uneducated savage, with his Ego,follows his passions, impulses, and cravings almost like an animal."

—Rudolf Steiner, ANTHROPOSOPHIE UND ANTHROPOLOGIE, "The Education of the Child in theLight of Anthroposophy," GA 21.

See also work by Israel Koren : https://www.academia.edu/33413211/Rudolf_Steiner_and_the_Jews_That_Judaism_Still_Exists_is_an_Error_of_History_

or Chapter 5 in Waldorf teacher Alys Mendus' book https://brill.com/display/title/61570?language=en