Because race, subrace, tribe, and class are meaningful and successful means of identifying kin, and the vast majority of us associate with, work with, vote with, reproduce with, kin, and the outliers (15%) are at the extremes where their sexual market value is vastly lower, or vastly higher than the mean of their kin group. And it’s good for each to do so. Diversity (Miscegenation) is extremely bad for genes except on the margins (low sexual and social market value). Because they cannot easily be corrected through ingroup selection.
All accusations of racism are just forms of gossip and shaming in order to obscure pursuit of political power without earning it through market means. Disapproval, shaming, gossiping, rallying, protesting, and propagandism are means by which the inadequate attempt to reduce the superior sexual, social, economic, and political market value of their superiors. It’s the industrialization through media of politics of pubescent girls, employed by infantile minds unable to ascend into the responsibilities of adulthood.
https://www.quora.com/Why-do-people-take-an-interest-in-Racism