Heroic sacrifices were often a common trope in anime and manga. It was the purest expression of love and the noblest of causes. Of course, beyond the act, its result is just as important. The death of a person only matters if it achieves something.
This was why, despite the millions that die in wars, only a chosen few get remembered. A good example is the 300 Spartans of Thermopylae. There were others with them. And there were others that died; yet only they were remembered as legends.
Simply dying by itself held no meaning. It was only when your death had purpose that it had the power to make others move. And sadly, that was not the case for the Sons of Africa. That was clear to everyone present. Their noble acts were maligned and wasted.
All to a bunch of sons of bitches that feasted on their rotting corpses. And if that was not bad enough, the ones that died were born out of sacrifice as well. Africa's excuse for not aiding its humans was to breed stronger reapers.
