I know a lot more about my heritage than you clearly do, and I am proud of it. That it would influence my identity shouldn't be surprising.
I wish to influence who my descendants will be, because I want my grandchildren to look like me and not some drug dealer from Africa.
And you're clearly a better person for it.
What if they look like drug dealers from New Zealand? Aside from attire and possible physical signs of drug use, how do drug dealers from New Zealand look different from non-drug dealers from New Zealand? If you had to choose, would you rather your grandchildren look like drug dealers from New Zealand or non-drug dealers from Africa?