There's a world of difference between a white guy being insulted in the States by a bitter, bigoted black person than being murdered in cold blood by a roving group of zealots on a revenge rampage in Zimbabwe. So, yeah, dangerous color based bigotry against ethnic European whites in some parts of Africa is a thing, but it does not translate to the States....at all. I deal with bigots of any race the same way; I try to avoid them, and duck out of conversations with them as quickly as possible. Such people tend to get very aggressive if you do not respond to their shit, or nod your head in mock agreement. They are fractured, damaged, truncated people, and not worth wasting your energy on, because they will not consider anything that differs from their views. That kind of change can only happen from within their own minds, on their own time, if it ever happens at all.
The cartoon just posted is presumably aimed at a US audience. It's exaggerated, propagandistic, and very much describes a neocon point of view. There are so very few instances of race-based, hate crime murder against whites - outside of prison gang related murders, which typically have much more to do with turf and activity control than anything else, regardless of race - that the cartoon is pointless, and dissembling, and it annoys me a lot.