“Racism” used to mean something like: a belief in the inherent superiority of one race over another. I’m pretty sure it’s no longer being used in that sense — if only for the simple reason that you’ll have difficulty finding folks who hold such beliefs. Go to the most hard-core HBD forums, and you’ll find detailed discussions of which ethnic groups exhibit what gene clusters are responsible for performance in what areas. What you won’t find is any talk of superiority of race A over race B. So who gets called “racist” these days? Sometimes it seems to be just a synonym for “white people”.
For lack of actual honest-to-goodness klansmen, the Social Justice Warriors leave no rock unturned in search for the racist demon. Random case in point: The constant flow of papers and commentary on online dating racial preferences. The latter exemplar is particularly hand-wringing: “New OKCupid Data on Race Is Pretty Depressing”. And what causes these gentle flowers to be depressed? The fact that some people prefer to date members of a certain race, perhaps (gasp!) even their own race. So basically: a man looking for a spouse of a particular gender within a particular age range, ethnic group and body type is engaging in sexism, racism, ageism, ableism, heterosexism, fat-shaming and a host of other unspeakable crimes.
Among homosexuals, who tend to be more direct about their preferences (no rice/no chocolate), this is also drawing criticism — albeit of a much softer, gentler kind (we all know who the real bad guys are).