Well, quite. All these terms, like "defective", imply an unflattering comparison with "normal" people. They're all examples of negative attitudes, if you like. That kind of language is very familiar, but what this article is actually saying (if I read it right - see my answer to Lady_S above) is radically anti-normative. That's why it's interesting (to me, anyway) that the writer feels no apparent discomfort using normative language in order to stake out an anti-normative position.