The wording in the article seems to place the blame squarely on the appearance of white skin color.
Ethnic hatred (which is what is usually meant by the usually-inaccurate term "racism") doesn't require differences in pigmentation.
Well, that would do it, since black skin color didn't appear, but was likely there to begin with.
Ethnic hatred (which is what is usually meant by the usually-inaccurate term "racism") doesn't require differences in pigmentation.
No it doesn't, but pigmentation differences certainly help.