I referred to a group and used their skin colour as the common denominator. No malice attached regarding this what so ever. You however, oversensitive to colour, probably from your troubled history, decided to attack the comment.
By the way generalization is common place in the world. I would be interested if you are offended by all of them. Germans are precise, Japanese build computers, Americans are loud, French are stroppy, English are pompous, Italians are passionate, fair skinned people get sunburned, skinny people don't last long when lost in the dessert and fat people float well, the list goes on. Why then would someone react so badly to see a reference to a group by their skin colour? Maybe you feel black skin is something to be ashamed of. Shame on you.