I'm aware that left-wing activists use the term "white supremacy" to refer to a range of things other than what people understand as being "white supremacy." But it's not an academic term--it confuses rather than clarifies by taking a word that most people understand to refer to explosive racist animosity and applying it to inanimate "systems." It's an activist term, under which every white person is a "white supremacist," which was deliberately chosen for the resulting inflammatory effect.

So I'm at a loss how you think that the "context" helps. The whole point of the article is that law schools have adopted radical activist ideology. The fact that folksy faculty members of a Midwestern law school are using radical activist rhetoric (which, as you acknowledge, seems "bizarre" to the 95% of folks who are unfamiliar with the terminology) seems to support the article's thesis.