i wonder if it's the strain of opposition that sees it as zero-sum and resists (i.e., "if things get fairer for the disadvantaged, then i, as an advantaged person, must necessarily lose something")?
or the strain that resists social normalization (e.g., i should be free to offend and belittle others)?
or something else?
even if everyone gains from growing the pie, the desire for relative status seems more powerful than our desire for fairness and equality unfortunately.