With the worldwide human population growing along with the scarcity of food, at this rate, everyone will starve to death, not only those in Africa, but the whole world. We will have to pick a post-apocalyptic ending for ourselves, the most likely one being "Soylent Green".
Killing these impoverished people off not only reduces the demand for food, but it will also ease their suffering. So-called "moral" people will think that the act of killing is immoral but why is it immoral? Must we wait for everyone to starve before we take action? Isn't killing off suffering people an act of mercy rather than barbarism?