Nonsense. Black people call one another "nigger" all the time, and as long as they do, nobody else should be mumbling "n-word" as if we were all 3-year-olds. Calling a person a nigger as an expletive is both rude and unworthy of our best nature, but simply refering to the word, as in, "This rap song uses the word 'nigger' at least 18 times," is just basic honesty.
Other than that, the author is completely correct that it's socially acceptable in many circles to use extremely debasing language about disabled people, and of course about unborn children. This is the way we can tell who's targeted for death.
Yes, but it only counts as “the n-word” when white people say it.