What do you mean he's right? Sure Racism and Discrimination towards a particular group unprovoked is objectively wrong but this guy is saying "A South African is racist to a West African, when they're both African"? which may be the case to a degree given they're both Niger-Congo Bantu but that cannot be applied to Somalis given we're not the same and I think Somalis at times can be grossly misinterpreted, just because they don't particularly get along with groups isn't hatred toward them because they hate them for whatever group they hail from, may in some cases but a large part of it has to do with the Cultural Differences us and them.
The world isn't as Black and White as that Gentleman plays it out to be, yes Racism is Objectively Wrong and should be suppressed as much but I think it's a lot more complex when it comes to the "Racism" from Somalis, since it isn't an Unprovoked one way street.