Blame the EFF
I'm no behavioural scientist, but the way certain groups of people act may incline other groups to perceive them negatively, which probably leads to the abuse meted out to inanimate objects of African descent. (I'm trying to word this carefully)
Read this article and have a look at the video. This was in (over)reaction to H&M's Monkey in the Jungle blazer faux pas
I understand that many in Europe are not exactly thrilled by the arrival of North African migrants for comparable reasons.