Firstly, the context of the quote from my next sentence is that things must be viewed from a distance to see the bend toward justice. Individual setbacks might make it seem incorrect over short periods, but history has generally showed it to be correct.

Secondly, it is not currently ok to say that "white people suck". The huge uproar over that is evidence of such. However, society has decided that saying "white people suck" is inherently different than saying "[any historically repressed minority] sucks". Society has also decided that context of those statements matters. Saying that offhandedly on Twitter as a joke is different than saying it in a campaign speech.