That's a pretty piss-poor piece, and a terrible disrespect to Lewis Caroll's genius.
Socialism, Feminism, Intersectionality, Equity and Inclusion . . . all of these things have one thing in common: there are as many meanings and explanations as there are adherents and practitioners. Non-believers like me, on the other hand, can define each with a single sentence, and can draw pretty reliable psychological diagnoses of each into the bargain!