This bit - from Anya's article
"Well, consider this: If someone were to use the word “dwarf”, many would be more likely to think of the mythical being rather than a person with dwarfism, because that noun dehumanizes them. By referring to a group of people with a collective noun, we separate them as “others” rather than considering them as people who happen to have a particular trait.
But if we set that trait apart by making it an adjective, we put emphasis on the person’s humanity: She’s not a Jew, she’s a Jewish person. He’s not a dwarf, he’s a person with dwarfism.
This fine distinction may be pedantic and overly sensitive to some, but it is interesting how such a simple case of grammar can affect our perception of others."
Calling someone a Jew is not the same as labelling someone a dwarf because they suffer from dwarfism. The name "Jew" has many more connotations. And that's why I think the article is rubbishy.