If more attractive, light-skin and white people were being murdered, the government and police would be more aggressive in trying to solve this problem.
This is something the majority aren't willing to face, when time and time again we see this to be true. It is because of colorism, and racism naturally, that people do not offer better service and attention to black Africans. It is also the reason more primitive Africans on and off the continent have accepted poor conditions, expect poor conditions and do not demand better (tokenism is not better). It is the same reason dark skin Africans, more so the more primitive ones, are not protected by respective institutions and are generally met with automatic disdain. Take the San, the Twa and other pygmy groups as an example.
It is generally thought that colorism in its gravest form is more an issue in countries with very mixed racial populations, but it is just as grave on the continent. Every African country has a 'beautiful people/tribe'. What is meant by that is usually the people/tribe with the majority light or brown skin Africans. It is also those groups that are likely to have the highest standard of living, albeit within an already pathologic standard.
Indeed, a sad story all around.