Race is the most prominent fault point in American politics, so it is in the interests of social revolutionaries to shake it up and promote friction.
The accusation of "racism" is hypocritical and inherently tethered to power dynamics, and means little more than "racial discourse which potentially threatens the power structure."
Expressions of racial animosity which benefit the power structure are allowed and even encouraged, such as hatred against Muslims following 9/11 (in order to spread jingoism) or Black hatred towards Whites during the Corona quarantines (in order to undermine social distancing and jump-start "muh economy" through convenient mass-demonstrations), but expressions of racial animosity which may destabilize the power structure, such as hating Jews or the idea of cumskin consciousness in general, are suppressed.