They are?
Why are these cops under the barriers trying to catch them, then?
You might be surprised but a lot of black leaders in Africa made deals and traded with Europeans "colonizers", allowing them to live within their lands which colonizers had "purchased" a right to settle in. The situation is not quite as simply as you make it out to be.
There was violence and brutality involved with as well, as is common in all human interactions before modern times. Not just white people and black people, but Africans internally, Asians, Middle Eastern, everybody. If we try to re-structure everything based on violence committed in the past against natives, then the Africans themselves have to ask a lot of questions about tribes that were genocided and conquered by other African tribes.