Whether you or I think there is a causation in specific cases is irrelevant, as is whether we apply charged terms like "racism" to certain causal linkages.
The point is that one is not compelled to believe in the causal link just because there is a statistical link.
So if certain causal links are politically contentious, rejecting them due to "political correctness" is completely separate from rejecting the facts, the statistics that are collected. It is political, but not in opposition to reality.
The article, as I understood it, is puncturing the assertion of objectivity by those who implicitly assert we have to regard all correlations as equally causal or else be against reason and logic.
