Please be careful about making generalizations.
"They" : who are "they"?
"In Africa" : There are over 50 countries in Africa and only one records the killings you describe.
Even though you speak of what is an unfortunate truth, you put it in a way that taints everyone African including the countries that are working hard to make themselves better.
Remember that making generalizations hurt people. We as albinos know very well the effects of making generalizations so lets be careful not to do what we fight against.