"Desecration" is not an objective concept. If the local people no longer remember that burial and regard it as sacred – and in the absence of written sources, seven centuries is enough to sunder any living link between a historical population and the population currently inhabiting a place – it is hard to claim that damage is being done here. Also, Africa has seen population movements, such as the Bantu Expansion, by which peoples living in a place today may not be the descendants of those uncovered by archaeologists at all.
This also isn’t something that foreigners are doing uniquely to Africa. Graves from this era regularly get dug up by archaeologists across Europe. How else do you think we know so much about the impact of the Mongol invasion and the Black Death on European settlements?
https://en.wikipedia.org/wiki/Atrocities_in_the_Congo_Free_S... https://en.wikipedia.org/wiki/Population_history_of_indigeno... https://en.wikipedia.org/wiki/Aboriginal_Tasmanians
[0] https://en.wikipedia.org/wiki/Kingdom_of_Kongo#First_Kongo-P...