The Freedom for which the ANC fought for 90 odd years?

Any scientists out there?
In South Africa, when a train or bus service arrives late, it is not uncommon for a mob to burn it. When [free] housing is demanded, houses are torched. When [free] sanitation is demanded, public toilets are demolished. When [free] education is demanded, schools and universities are destroyed. When better [free] medical facilities are demanded, clinics are burned. When 'respect for African culture' is demanded, cultural treasures belonging to other cultures are destroyed. Is this sort of behaviour taught, or is it genetic? Scientists, please enlighten us; we are mystified.