I am sadly certain that no race is excluded from the capacity to oppress. As a general statement black communities, in my experience, are notoriously regressive when it comes to acceptance of non-cisgender heterosexuals, most likely (again my observation) due to the fact that black Christian religion tends to be more fundamentalist in its treating of non-cisgender heterosexuals compared to white Christian religion. This isn't to say that whites aren't regressive toward the same people - they clearly are - but that I've personally observed a higher concentration of such sentiments in black communities. (I will note to qualify this further that my experience with both black and white communities is predominantly urban.)
And I don't bring this up to justify any oppression against blacks, of course. Oppression in all forms is wrong. But I have to say, in response to the implied statement that minorities cannot oppress other minorities in Putin's question, that yes, minorities can. After all, Croats oppressed Serbs in the Bosnian War, for example, even though Croats were outnumbered 2 to 1. Hell, whites in the Southern US oppressed blacks even though blacks were, by population, a clear majority. In fact slavery in general is usually the practice of some minority oppressing a majority, not the reverse.
So yes, minorities can and do oppress. Whether it's blacks and Latinos oppressing Muslims in Southern California I couldn't say, that's not my area of expertise, but as all races of humans are humans, all races are capable of falling into the same tragic behaviors of human history, oppression included.