There is no narrative, you're claiming a person/group can't be racist towards white folk. To me racism is racism, don't matter who it is to the other... if they're discriminating based on ethnicity it's racism. End of.
If we're to live in a society of equal rights and what not, your logic goes against that if we're going to give a "free pass" to blacks/etc. discriminating whites and we're to turn a blind eye to that just because.