To avoid getting off the important matter - namely some scrote threatening Effendi’s daughter- reverse racism began as a term of the right (not the far right) used initially in an ironic manner to describe affirmative action in the US : ‘No whites may apply for this job’ sort of thing.
Unfortunately, since there are some Americans who are the epitome of the notion that the nation doesn’t do irony, the term became mainstream in some quarters, and was used by some on the right (still to the left of what's now the alt-right)in a bid to in effect suggest that all was fine and dandy and there were no actual instances of discrimination against non-whites, and that racism was dramatically overstated (not in a 'SJW's bleat too much' manner, but 'there are very few cases in the US where people are discriminated against or treated differently because they're black, and those saying otherwise are liars')
The inevitable SJW backlash has been under way for some years, with that camp maintaining that no BME person can be racist. This is why they don’t like people like Trevor Phillips pointing out this is rubbish. The left didn't create the term, and rails against it because it does point to the possibility of non-whites being racist, which they don't accept. (I disagree - I have met, for instance, some, otherwise charming Indonesians whose views on those of Chinese origin make Nick Griffin look like Martin Luther King). If you google 'reverse racism' you'll find lots of SJWs decrying the term, not supporting it. There is, as I recall, an extremely worthy Wikipedia entry about it as well, which barely captures the complexity (because if you do that, you have to admit...)
Effendi, if he'll forgive my point, should simply have said 'racism'. It looks as though the harasser of his daughter is doing so because of her race - although as I've said, I suspect it's largely because of her gender and he is taking some pleasure from frightening her because he likes frightening women. The racist, misogynist, cowardly ****.