I'm hoping that last one is a joke.
Close but not exactly. It is parody that was made to highlight how stupid it is to try to rebrand racism into "power+prejudice."
And really, this rebranding is not helping anyone. By claiming that person X cannot experience racism SJWs are simply ignoring some peoples suffering but not really doing anything that would help the others who face racism either.
Why can't we just accept that all racism is bad and that depending on the location there are ethnic groups that face more racism than others. In fact I am not even denying that some ethnic groups have less power and face institutional racism and opression that other groups don't (depending on the location of course.) It is just that claiming that "group X can not be racist because blah" is derailing the conversation and is just an argument over semantics.
Yes, in USA (or at least parts of USA) a black person A still faces institutional racism while a white person B does not face the same hurdles, but that does not mean that A shouting that "all white people are subhuman mutants, whose low melanin numbers are a clear indication of their inferiority, need to be shot" would not be racist. (It also does not mean that mere racist remarks would be as bad as being jailed for petty crimes when someone of different skin colour would be treated more leniently by the courts.)
This (much like many other cases) is not a zero sum game and the fact that even the opressed ethnic groups can be racist does not mean that they aren't opressed. In fact, any person being a racist is a minor problem and a thought crime at most unless they commit opression or hate crimes due to that racism. If a group of black people and a group of white people both hold racist ideas but don't act on it no harm is done. If those groups both kill a member of a different ethnic group due to their racism then it is just as bad. AND if one of those groups get away with murder because the society and the law do not care for one of the victims then THAT is the real problem but it won't go away by claiming that one of those murders wasn't as bad because the killers can't be racist.